Tag Archives: urban flooding

The Earth Is Speaking to Us

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Like most people, I am not worried about the wrath of ancient pagan gods, but I had to wonder. It was just a week ago, amid the horrible air quality in the Midwest, including Chicago, that I told my wife that a good rainstorm might serve to clear the air of many of the particulate pollutants from distant Canadian wildfires. Visibility had been horrible, and Chicago was for two or three days ranked among the world’s dirtiest cities. Due to numerous variables, one must qualify what I said, but generally, rain can be expected to clear the air somewhat.

For healthy individuals, particularly those like myself without any serious respiratory illness, it was still easy to notice that breathing became a bit more strained during that air pollution emergency as fine particles from burning forests drifted through the region. For those with asthma, COPD, and other respiratory challenges, it must have been literally breath-taking to step outside. Those who could found ways to stay indoors, especially if air conditioning could help to filter air quality.

I mention the vengeance of pagan gods because I truly did not expect what happened on Sunday, July 2. It began early in the morning before dawn, maybe a bit before midnight in some places, but the skies opened up to produce record-breaking downpours. It was raining heavily by the time I woke up, around 6 a.m. It was still raining when my wife and I took our grandson to church. The windshield wipers never stopped, and we brought a large umbrella and wore raincoats. Afterwards, around 11:30 a.m., we left Hyde Park to head north along Jean Baptiste DuSable Lakeshore Drive to our home on the North Side, only to find the 47th St. entrance to Lakeshore blockaded.

Flooding July 2 near 95th St. on Chicago’s South Side. Photo by Greg Mathis

While the city was hosting NASCAR races on downtown streets over the weekend (not an event that I find worth the annoyance), blocking access at 47th seemed like an unlikely measure, so I assumed that it was done because the rains had flooded parts of the drive. (It turned out that it was closed for NASCAR, but it created other problems for us in avoiding flooded streets.) After all, cell phones were receiving warnings about flash flood emergencies throughout the area. Traffic was rerouted because of flooding on I-290, a major corridor in the metro area.

I had to find a series of detours to make our way home, with a stop along the way on Martin Luther King Jr. Drive at a Culver’s restaurant for lunch after Jean complained she was getting hungry. The rain almost never stopped except for very short intervals. Precipitation eventually totaled anywhere from three to seven inches for the day, depending on the location, with totals exceeding eight inches in some suburbs. Certain neighborhoods that face more significant problems with drainage infrastructure experienced flooded basements, most notably the Austin area that is home to Chicago’s new mayor, Brandon Johnson, who toured the area yesterday. Also hard-hit were some western suburbs like Cicero. More than a few people were driven from their homes or faced a great deal of potentially expensive work in cleaning up the mess and replacing some furniture and appliances. Businesses providing such services kept their employees on the job through the July 4 holiday, in part because delays can facilitate the growth of mold.

Much of the damage was further demonstration of a problem that has become known as urban flooding, in which high-precipitation storms that are becoming more common as a result of climate change interact with urban areas whose drainage systems are not designed to handle them. This also introduces an environmental equity problem because many of those neighborhoods are older areas with high percentages of minority and low-income populations. This poses a serious planning challenge for cities like Chicago as they seek to remedy such inequities.

It has been twelve years since Mayor Rahm Emanuel dismantled the Chicago Department of the Environment that had been created under Mayor Richard M. Daley. One-term Mayor Lori Lightfoot had originally promised to restore it, but never did so. Now, Mayor Johnson has pledged to reestablish it, and this series of events may well push him hard to adhere to his promise. He said as much as he spoke about the challenges on Monday, July 3. A political science major as an undergraduate, I am not naïve enough to believe that recreating the department will solve all of Chicago’s many environmental problems, in part because mayors will come and go and priorities will change, but it cannot hurt for now to build some sort of political momentum behind whatever mission it is given. Based on Johnson’s statements so far, one could reasonably expect that climate issues would be high on the agenda. But we shall see. Actions speak louder than words.

But certain words matter because they frame the problem being addressed. According to the Chicago Tribune, Johnson told reporters, “Literally, the earth is speaking to us loud and clear, where extreme weather is taking place all over the country. . . .  [T]his is not likely the last extreme example of weather.”

It is time to roll up our sleeves. It is time to debate solutions, not the reality of climate change. In Chicago, at least, that is no longer much of an issue. The issue is what we aim to do about it.

Jim Schwab

The Need for Resilient Infrastructure

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This summer, the Federal Emergency Management Agency (FEMA) is at last rolling out its Building Resilient Infrastructure and Communities (BRIC) program, and its first Notice of Funding Opportunity will likely be issued in September. In July, FEMA is airing a series of five weekly webinars to introduce BRIC to communities and state officials around the nation. BRIC is the practical result of provisions in the Disaster Recovery Reform Act, passed by Congress in 2018, to create a secure funding stream for what was formerly the Pre-Disaster Mitigation program. I plan to discuss all that in coming weeks on this blog.

But the personal impact on me was to remind me to attend to an egregious oversight on my part that began earlier this year with the release by the American Planning Association (APA) of a new Planning Advisory Service Report, Planning for Resilient Infrastructure. I read it, attended to some other business in Texas and Nebraska in late February and early March, and along came the coronavirus, upending most of my existing personal and professional plans and refocusing my attention. But it is time for me to give this report the attention it deserves.

First, there is the question of why it deserves attention. The National Oceanic and Atmospheric Administration (NOAA), which funded the project led by the Association of State Floodplain Managers (ASFPM), which partnered with APA, chose their joint proposal in funding the first round of projects under its Coastal Resilience Grants Program in 2016. As Jeffrey Payne, director of NOAA’s Office for Coastal Management, states in his preface, “Tomorrow isn’t what it used to be. Increasingly, coastal conditions include all the risks of the past, but risks that are amplified by a changing climate, rising seas, and more rapidly fluctuating Great Lakes.”

In the interest of full disclosure, I was involved with ASFPM executive director Chad Berginnis in co-authoring the proposal for this project in the summer of 2015. (After I left APA, ASFPM hired me back as a consultant in later stages of the effort to help refine and focus the PAS Report.) Our intent was both simple and bold. Local governments spend tens of billions of dollars annually on the construction and maintenance of various kinds of infrastructure. Much of that infrastructure, related to essential services including water, wastewater, and transportation, is subject to the impacts of climate change. While, as Payne goes on to state, this is true away from the coast as well, some of those impacts are particularly significant and noticeable in coastal states and communities. In short, a great deal of taxpayer money is at stake regarding the ability of that infrastructure to withstand future climate conditions and natural disasters. Planning for greatly increased resilience is a recipe for improved fiscal stability. This holds true even if, as planned by statute, a greater share of that funding for hazard mitigation projects comes from FEMA through BRIC. Taxpayers are taxpayers, whether the money used is federal, state, or local.

All that said, the serious work of completing the work fell to Joseph DeAngelis at APA, now the manager of the APA Hazards Planning Center, and Haley Briel, a research specialist for the Flood Science Center at ASFPM, along with Michael Lauer, a planning consultant with deep experience in growth management programs in southeastern coastal states.

Global average sea level rise from 1880 to the present, based on tide gauges and satellite measurements (US EPA). Reuse courtesy of APA.

Their collaborative report addresses the most significant issues of infrastructure resilience. Particularly in areas subject to coastal storms, these involve not just the impacts of major disasters but the everyday nuisance impacts of flooding because of high tides atop sea level rise that already are yielding closed streets and parks and flooded basements. Urban flooding has become a “thing” where the term never used to be heard. They include a small table with projections by the U.S. Global Change Research Program showing ranges of sea level rise between 0.5 and 1.2 feet by 2050, and 1 to 4 feet by 2100. Of course, these are rough ranges in part because various geological conditions, such as erosion or glacial rebound, cause different results from one region to another, although most of the East Coast faces serious problems over the coming century. A major part of the problem is that sea level rise amplifies the impact of high tides in storms, leading to increased flooding and erosion that is already evident in low-lying cities like Norfolk, Virginia, or Miami. The authors note that, “Over the last half-century alone, with just one to three inches of average sea level rise, daily high-tide flooding has become up to 10 times more frequent” in American coastal communities. Even in Midwestern communities, including those along the Great Lakes, problems result from climate-driven increases in high-precipitation storms that frequently overwhelm stormwater drainage systems built in an earlier era based on other, less challenging, assumptions.

Storm surge heights are cumulatively based on the mean sea level, the height of the tide, and the high volume of water pushed toward the shore by coastal storms (National Hurricane Center). Reuse courtesy of APA.

It is natural that a planning document is going to assert a role for planners in addressing these problems. The role the report asserts is entirely logical, starting with “assessing long-term infrastructure needs and understanding future risks to infrastructure assets.” Equally logical, however, is that the report builds upon prior APA literature to outline the need for coordinated action through the plan-making process to integrate climate risk into local plans as a means of “capturing the future conditions to which existing infrastructure and any planned infrastructure projects will be subjected.” Put simply, if the local planning process does not identify those risks and provide clear recommendations for creating resilient infrastructure, it is not likely to materialize in any coherent and consistent fashion. The third chapter outlines a step-by-step approach (see illustrations below) for developing an inventory of local infrastructure, identifying risks, and moving toward an effective plan for adaptation.

The process for conducting an infrastructure vulnerability assessment (Joseph DeAngelis). Reuse courtesy of APA for both diagrams.

 

 

 

 

 

A project or asset’s vulnerability to flood impacts is a product of its exposure, sensitivity, and adaptive capacity (Joseph DeAngelis).

Later, the report provides some examples of what such consistent planning for resilient infrastructure may look like. Its case study of San Francisco’s approach to assessing sea-level-rise impacts outlines how the Sea Level Rise Committee of the city’s Capital Planning Committee (CPC), a body responsible for overseeing capital investments for infrastructure, recommended using the upper end of estimates from a National Research Council report for the West Coast. These were fed into a CPC guidance document for assessing vulnerability and supporting adaptation to sea level rise, a primary outcome of climate change. Without engaging the full details here, the bottom line is that the City and County of San Francisco was working from a single play book for climate adaptation of project life cycles for future infrastructure. Capital planning could thus proceed in a more standardized manner based on common assumptions. The report also uses an extensive example from Toledo, Ohio, the site of one of two pilot projects supported by the ASFPM/APA project. Toledo, sitting on the shores of Lake Erie, has suffered from stormwater flooding and is approaching the problem with a mixture of green infrastructure and analysis of social vulnerability in affected neighborhoods. The report elsewhere delves into questions and methods of documenting and addressing environmental justice and social and racial inequities in environmental protection through appropriate local capital planning projects.

Both cases highlight the value for local planners of establishing credible data sources, which often rest within federal agencies such as NOAA and the U.S. Environmental Protection Agency. But, as one chapter illustrates, these can include experienced national nonprofits as well, such as Climate Central. Unquestionably, however, the best single assemblage of data and tools is NOAA’s own Digital Coast website. Planners can access additional high-quality resources on climate through other NOAA programs such as the Regional Climate Centers, located at a series of universities across the nation, and the Regional Integrated Sciences and Assessments, where RISA staff work directly with climate scientists to communicate the science to the public and local officials.

Just as important as understanding where to find the proper data and tools, however, is a knowledge of best practices in local capital improvements planning, the development of effective standards, guidelines, and regulations for creating resilient infrastructure, and, finally, the best means for financing such long-term investments in infrastructure, especially with an eye to climate resilience. Each of these three topics is covered in separate chapters in the second half of the report.

View of part of the Jersey Shore after Hurricane Sandy, February 2013.

Ultimately, the real challenge for local planners is overcoming a natural discomfort with the inherent uncertainties in planning for infrastructure that must withstand the impacts of climate change within a range of assumptions that, in part, depend on federal and even international action to mitigate rising global temperatures as a result of greenhouse gas emissions. Planners, and the communities they serve, must adjust to those uncertainties and the inherent complexities they embody. Planning, however, has always been a speculative enterprise riddled by uncertainties, yet cities have embraced assumptions about population growth, demographic change, and economic scenarios that have often been equally uncertain, for none of us has a crystal ball. What we do know, however, is the direction of existing and accelerating trends, and climate change is no myth. We are ultimately better off, and will better invest public resources, by anticipating climate change with the best projections available, so that our communities are not overwhelmed by future storms, sea level rise, and storm surge. We cannot say we did not see it coming. We can only hope to say we used a wise approach based on the best data available to avoid catastrophe for ourselves and future generations in the communities we serve.

Jim Schwab

 

Great Lakes Merit Protection

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I grew up near the shores of Lake Erie, in suburban Cleveland. After a seven-year stint in Iowa and Nebraska, I ended up in Chicago, where I have lived since 1985. The Great Lakes have been part of my ecological and geographic consciousness for essentially 90 percent of my lifetime. As an urban planner, that means I am deeply aware of their significance on many levels.

It will surprise no one, then, that as a planner who has focused heavily on environmental and natural hazards issues, I have been involved in projects aimed at protecting that natural heritage. As manager of the Hazards Planning Center at the American Planning Association (APA), I involved APA as a partner with the Association of State Floodplain Managers (ASFPM) as ASFPM developed its Great Lakes Coastal Resilience website with National Oceanic and Atmospheric Administration (NOAA) support. Later, I prepared a successful grant for support from NOAA’s Sectoral Applications Research Program for a project on integrating climate change data into local comprehensive and capital improvements planning. In that project, APA collaborated with the Chicago Metropolitan Agency for Planning and the University of Illinois. That project, which involved work with five pilot communities in the Chicago metropolitan area, was (and still is) ongoing when I left APA at the end of May 2017. The aim was to develop applicable models for such planning for other communities throughout the Great Lakes region.

It is thus always encouraging to see others pick up the same mantle. It was hardly surprising that the Environmental Law & Policy Center (ELPC), a long-time Chicago-based staple of the public interest community, would see fit to do so. On March 20, in concert with the Chicago Council on Global Affairs, ELPC released “An Assessment of the Impact of Climate Change on the Great Lakes,” with 18 scientists contributing to the 74-page report. I spoke two weeks later with Howard Learner, the long-time president and executive director of ELPC, about the rationale and hopes for the report.

The impact of adding one more report to the parade is cumulative but important. Learner explained that national studies, particularly the National Climate Assessment, mention regional impacts of climate change, but that drilling down to the impacts on a specific region and making local and state decision makers aware of the issues at those levels was the point. Thus, he asked Don Wuebbles, an atmospheric scientist at the University of Illinois and a science adviser to ELPC, to assemble a team of experts for the purpose. Wuebbles recruited most of the team, with the goal not only of identifying problems but of developing or pinpointing solutions. Repeatedly, Learner emphasized the public policy role of ELPC as a “problem-solving” institution. The intended audience was governors, provincial ministers, congressional delegations from Great Lakes states, and other public officials, providing them with an assessment of the state of the science concerning the Great Lakes.

I won’t even attempt to review all the data in the report, but certain points are essential to an adequate public understanding. For one, the Great Lakes are simply huge and constitute a very complex ecosystem in a heavily populated region of more than 34 million people in the U.S. and Canada, the vast majority of whom repeatedly express support for protection of the Great Lakes in public opinion polls. It is the largest freshwater group of lakes on the planet, and second largest in volume. It is a binational ecosystem that demands cooperation across state, provincial, and national boundaries. It is home to 170 species of fish and a $7 billion fisheries industry. It has long been home to one of the most significant industrial regions of both nations. What happens here matters.

The term “lake effect” is most often associated with the Great Lakes because their sheer mass has a measurable impact on local and regional weather patterns. Winds pick up considerable moisture that often lands downwind in the form of snowstorms and precipitation. For instance, any frequent visitor of farmers’ markets along the Great Lakes is likely to be aware of western Michigan’s “fruit belt” offerings of apples, cherries, pears, and other crops dependent on the lake effect.

Figure 3. Observed changes in annually-averaged temperature (°F) for the U.S. states bordering the Great Lakes for present-day (1986–2016) relative to 1901–1960. Derived from the NOAA nClimDiv dataset (Vose et al., 2014). Figure source: NOAA/NCEI (Both images reprinted from report courtesy ELPC.

Figure 4. Projected change in annually-averaged temperature (°F) for U.S. states bordering the Great Lakes from the (a) higher (RCP8.5) and (b) lower (RCP4.5) scenarios for the 2085 (2070-2099) time period relative to 1976-2005. Figure source: NOAA/NCEI

The lake effect, of course, is a part of the natural system in a region carved out of the landscape by melting glaciers at the end of the last Ice Age. Recent climate change is another matter. The region has already experienced a 1.6° F. increase in average daily temperatures in the 1985-2016 period as compared to the 1901-1960 average. Those increases are expected to accelerate over the remainder of this century. It is not just temperatures that change, however, because changing weather patterns as a result of long-term climate change result in altered precipitation patterns. Summer precipitation is predicted to decline by 5 to 15 percent, suggesting some increased propensity for drought, while winter and spring precipitation will increase, producing an increased regional propensity for spring flooding. Increased intensity of major thunderstorm events will exacerbate the vulnerability of urban areas to stormwater runoff, resulting in increased “urban flooding,” often a result of inadequate stormwater drainage systems in highly developed urban areas. That, in turn, has huge implications for municipal and regional investments in stormwater and sewage treatment infrastructure. In addition, heat waves can threaten lives and public health. Public decision makers ignore these implications at the fiscal and physical peril of their affected communities.

Among those impacts highlighted in the report is the increased danger of algal blooms in the Great Lakes as a result of changing biological conditions. The report notes that the largest algal bloom in Lake Erie history occurred in 2011, offshore from Toledo, Ohio, affecting drinking water for a metropolitan area of 500,000 people.

There is also danger to the stability of some shoreline bluffs, an issue highlighted on the Great Lakes Coastal Resilience website, as a result of reduced days of ice cover during the winter. While less ice cover may seem a minor problem to some, in fact it means changes in water density and seasonal mixing patterns in water columns, but it also means the loss of protection from winter waves from storm patterns because the ice cover prevents those waves from reaching the shore until the spring melt. The result is increased shoreline erosion.

All of that harks back to the central question of my interview with Learner: What do you hope to achieve? “The time for climate action is now,” he insisted, noting that the Trump presidency has been “a step back,” making it important for cities and states to “step up with their own climate solutions.” Learner hopes the report at least provides a “road map” for governors and Canadian premiers to focus their actions on the impact of climate change on the Great Lakes, such as “extreme weather events.”

Curiously, one arena in which new action may be possible is the city of Chicago itself, which on April 2 elected a new mayor, Lori Lightfoot. Media attention has focused on the fact that she is both the first gay mayor and the first African-American female mayor in the city’s history, but equally significant is her history as a former federal prosecutor who campaigned against corruption. Learner notes that outgoing Mayor Rahm Emanuel convened a Chicago Climate Summit in November 2017, and that ELPC is now “looking to Mayor Lightfoot to step up Chicago’s game” to benefit both the local economy and environment with a stronger approach to climate change.

The same can be said, of course, for numerous other municipalities choosing new leadership and for the new governors of the region, including J.B. Pritzker in Illinois. They all have much work to do, but an increasing amount of research and guidance with which to do it.

Jim Schwab