Coastal communities in the United States are largely unprepared for the projected effects of the climate crisis, including more intense storm surges, sea level rise, increased precipitation, and other drivers of coastal and inland flooding. That flooding is damaging enough on its own, but in recent years, chemical spills triggered by extreme weather, such as hurricanes, have become more frequent, exposing nearby communities to toxic chemicals and hazardous waste in the midst of natural disaster. Extreme weather-related flooding already has a variety of negative public health impacts, including injury, exposure to pathogens and mold, stress, and displacement. Chemical and hazardous waste spills may exacerbate and cause harms such as dermatitis, rashes, burns, headaches, fatigue, abdominal pain, fever, decreased appetite, nausea, sore throat, and eye irritation.
Unfortunately, federal and state governments have failed to develop regulatory safeguards that would prevent chemical spills in the event of these predictable extreme storms. That needs to change. Federal and state agencies should review the many permitted facilities at risk of flooding and focus inspections, outreach, technical assistance, and compliance resources on the most vulnerable facilities. As deemed necessary, agencies should reform regulations and permit programs for industrial facilities to account for future flood risks. State agencies should also assess risks to communities at the fenceline of hazardous facilities and take action to protect these vulnerable communities from harm.The effects of climate change are increasing the frequency of coastal floods and chemical releases
As the effects of climate change amplify, changing patterns in hurricanes, precipitation, and sea level rise will increase both the intensity and frequency of storm surges and coastal flooding in the United States.,,, According to the National Oceanic and Atmospheric Administration (NOAA), the regions most vulnerable to flooding and sea level rise are the Gulf Coast, Eastern Seaboard (especially Southeastern states), and the Pacific Northwest. The social and economic implications of these projections are significant. More than half of the U.S. population (164 million people) lives or works in coastal counties, generating 58 percent of the nation’s GDP.
Hurricane Harvey: A Cautionary Tale of Climate-Driven Disaster
In 2017, Hurricane Harvey dumped up to 50 inches of rain on Houston, Texas and surrounding areas.[a] Forty-six industrial sites released approximately 4.6 million pounds of hazardous materials from preemptive shutdowns and startups, leaks, or explosions, and several Superfund sites were underwater for days.[b] In particular, flooding at the Arkema chemical plant in Crosby, Texas, disabled the refrigeration system, causing organic peroxides to explode.[c] As a result, 21 people sought medical attention and hundreds within 1.5 miles of the plant evacuated their homes.
Despite presumed dilution of contaminants by floodwaters, heavy metal concentrations in stream water increased after the hurricane, demonstrating the sheer volume of contaminants present.[d] Furthermore, an assessment of Manchester—a Houston neighborhood with 21 toxic facilities within one mile—found that residents were exposed to elevated levels of PAHs through household dust and outdoor soil redistributed by floodwaters.[e] Long-term exposure to PAHs contributes to an elevated risk of developing breast, lung, gastrointestinal, and bladder cancer. Most of Manchester’s residents are Hispanic with a median household income one-third less than Houston overall.
After the storm passed, Manchester residents noticed a foul, persistent odor. Sandra Martinez, who lived in the neighborhood with her husband and six children, said, “You could literally smell it in the house…I just pray for my kids. Because you don’t know if there was a chemical spill.”[f] After 10 days of experiencing bronchitis, asthma, nausea, nosebleeds, headaches, and stomachaches, the family felt they had no option but to move elsewhere.
[a] Friedrich MJ. Determining Health Effects of Hazardous Materials Released During Hurricane Harvey. JAMA. 2017;318(23):2283-2285.
[b] Johnston J, Cushing L. Chemical Exposures, Health, and Environmental Justice in Communities Living in the Fenceline of Industry. Curr Environ Health Rep. 2020;7(1):48-57.
[c] Anenberg SC, Kalman C. Extreme Weather, Chemical Facilities, and Vulnerable Communities in the U.S. Gulf Coast: A Disastrous Combination. GeoHealth. 2019;3;122-126.
[d] Kiaghadi A, Rifai HS. Physical, Chemical, and Microbial Quality of Floodwaters in Houston Following Hurricane Harvey. Environ Sci Technol. 2019;53:4832-4840.
[e] Horney JA, et al. Comparing Residential Contamination in a Houston Environmental Justice Neighborhood Before and After Hurricane Harvey. PLoS One. 2018;13(2):e0192660.
[f] Dart T. After Harvey, Houston Suburb Suffers a Persistent Problem: Waves of Foul Air. The Guardian. January 29, 2018. Accessed at https://www.theguardian.com/us-news/2018/jan/29/houston-manchester-hurricane-harvey-texas-foul-air.
The health effects of extreme weather-related chemical releases are difficult to predict with accuracy because communities are exposed to different mixtures of chemicals that, when released and combined with whatever else is present in floodwaters, may produce a variety of effects. People also respond differently to chemical exposure. A study of hurricane-related chemical releases from facilities in Louisiana and Texas in 2005 found that 197 different hazardous substances were released in 166 events. In most cases, only one hazardous substance was released per event, but in some instances, as many as eight were released. Among the more common toxicants released are volatile organic compounds (VOCs), polyaromatic hydrocarbons (PAHs), petroleum, and heavy metals., Floodwaters may also stir up existing contaminants present in soil and waterways, forming a “toxic soup.”
The following health outcomes have been reported from flood-related chemical exposure: dermatitis, rashes, burns, headaches, fatigue, abdominal pain, fever, decreased appetite, nausea, sore throat, and eye irritation.,, Some contaminants, like heavy metals, may also adsorb to sediments and redistribute throughout an area with floodwaters., For example, researchers found elevated levels of lead and arsenic in soil samples following Hurricanes Katrina and Sandy.
Emergency response and clean-up workers are also exposed to hazardous pollutants. Some hydrocarbons can damage neoprene protective wear, and wetsuits may increase skin contact with chemical contaminants. In a survey of New Orleans firefighters three months after Hurricane Katrina, 38 percent reported one or more respiratory symptoms and almost half— most of whom had contact with floodwaters—reported skin rashes. Workers performing post-disaster repairs or demolitions can also inhale dust containing chemical contaminants and heavy metals. Another study, this one of New Orleans construction workers, noted elevated cases of pneumonia, asthma, and transient fever and cough following Hurricane Katrina.
Due to a legacy of redlining, exclusionary zoning practices, and other systematic forms of housing segregation, the vast majority of people who live near chemical facilities are Black, Hispanic, and have low wealth., These communities often grapple with a range of social stressors, such as higher rates of chronic disease, inadequate access to health care, substandard housing, and racism-related stress., The cumulative burden of socioeconomic stress, flooding, and pollution from chemical facilities exposes these families to a greater risk of “debilitating damage, uncompensated loss, and long-term suffering.” Children, the elderly, incarcerated people, and people with disabilities are also vulnerable to harm from floods.
For example, when Hurricane Florence hit North Carolina in 2018, inadequate safety measures led to releases of coal ash and caused hog waste "lagoons" to overflow into nearby communities. Research shows that industrial hog facilities are disproportionately permitted near communities of color in North Carolina, and for years before the hurricane, health outcomes have been worse among residents living near hog concentrated animal feeding operations (CAFOs)., Flooding and exposure to more toxic contaminants only worsened the existing burden felt by these communities.Better oversight and permitting of industrial facilities will protect the most vulnerable communities from harm
Since it is difficult to control the effects of extreme weather-related chemical spills, experts recommend a preventative approach to protect public health. Researchers also project these events to become more frequent, “whether due to more development in hazardous areas, anthropogenic climate change, or natural variation.” While awareness of these events has grown over the last decade, they are inadequately regulated at the federal, state, and local level. Currently, neither the Occupational Safety and Health Administration (OSHA) nor the Environmental Protection Agency (EPA) require facilities to comprehensively address extreme weather and flood risks in required pollution prevention and management programs. Furthermore, few states address flood risks in the permitting of industrial facilities.Recommendations
The effects of climate change are upon us, and recent extreme weather events provide ample evidence of the folly of leaving toxic chemicals in the path of perfectly predictable floodwaters. Regulators should utilize their authority under state and federal law to prevent and mitigate climate-driven disasters by:
Lawmakers should establish and fund programs creating siting, construction, and monitoring standards for above-ground hazardous chemical storage tanks and other unregulated chemical facilities exposed to extreme weather and flood risks.
Learn more about CPR's Toxic Floodwaters program.Contact Darya Minovi.
© Center for Progressive Reform, June 2020
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