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Washington, DC - Obama Administration Releases Scientific Assessment on Impact of Climate Change to Human Health in the United States:

Today, delivering on another commitment in the President’s Climate Action Plan, the Obama Administration released a new final report called The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment, which significantly advances what we know about the impacts of climate change on public health, and the confidence with which we know it.

Developed over three years by approximately one hundred experts in climate-change science and public health – including representatives from the Environmental Protection Agency (EPA), the Department of Health and Human Services (HHS), the National Oceanic and Atmospheric Administration (NOAA), the National Aeronautics and Space Administration (NASA), the Department of Agriculture (USDA), and U.S. Geological Survey (USGS), the Department of Defense (DOD), and the Department of Veteran’s Affairs (VA) – the Climate and Health Assessment reinforces that climate change is a significant threat to the health of the American people not just in the future but right now. As the climate continues to change, the risks to human health will grow, exacerbating existing health threats and creating new public health challenges, and impacting more people in more places. From children to the elderly, every American is vulnerable to the health impacts associated with climate change, now and in the future. A few examples of the increased health risks found in the assessment include:

In addition, today, the Administration is announcing a number of actions to respond to the critical challenges and vulnerabilities outlined in the Climate and Health Assessment. These include:

The findings of the Climate and Health Assessment strengthen and broaden the scientific foundation for future decision making, allowing individuals, communities, organizations, and governments to proactively manage the health risks of climate change.  A better understanding of how climate change affects our health, and the health of our children and grandchildren, underscores the need for urgent action to combat the threats climate change poses on American citizens and communities.

Already, under President Obama’s leadership, the United States has done more to combat climate change and protect the health of communities than ever before. For example, the Clean Power Plan will deliver better air quality, improved public health, clean energy investment and jobs across the country. Since the historic global climate agreement was reached at COP21 in Paris last year, the United States has announced plans to not only implement the agreement to reduce greenhouse gas emissions, but has also committed to adopting an amendment to the Montreal Protocol that would phase down HFCs, a potent greenhouse gas. The Administration has forged a global agreement to cut aviation emissions, and most recently taken a series of actions to reduce methane emissions from the oil and gas sector, while also helping to spur a historic increase in wind and solar energy while doubling the fuel efficiency in our cars.

HOW CLIMATE CHANGE AFFECTS HEALTH:
KEY FINDINGS AND MESSAGES FROM THE ASSESSMENT

Changes in Extreme Heat and Extreme Cold.  A warmer future is projected to lead to “on the order of thousands to tens of thousands of additional premature deaths per year across the United States by the end of this century” from heat.  Any reduction in cold-related deaths is projected to be smaller than the increase in heat-related deaths in most regions. High temperatures can also lead to a wide range of illnesses. Examples of illnesses associated with extreme heat include cardiovascular, respiratory, and renal illnesses; diabetes; hyperthermia; mental health issues; and preterm births.  Even small differences from seasonal average temperatures result in illness and death.  An increased risk for respiratory and cardiovascular death is observed in older adults during temperature extremes.

Impacts on Air Quality. Changes in the climate affect the levels and location of outdoor air pollutants such as ground-level ozone and fine particulate matter.  These changes in ozone are projected to lead to hundreds to thousands of premature deaths, hospital admissions, and cases of acute respiratory illnesses per year in the United States in 2030.  In addition, the area burned by wildfires in North America is expected to increase dramatically over the 21st century due to climate change.  Air pollution from wildfires can affect people far downwind from the fire location, increasing the risk of premature death and hospital and emergency department visits.  Higher temperatures and increasing carbon dioxide levels also promote the growth of plants that release airborne allergens.

More Frequent and Intense Extreme Events.  Climate change will expose more people to increases in the frequency and/or intensity of drought, wildfires, and flooding related to extreme precipitation and hurricanes.  Many types of extreme events related to climate change cause disruption of critical infrastructure, including power, water, transportation, and communication systems, that are essential to maintaining access to health care and emergency response services and safeguarding human health.  Health risks may also arise long after the event, or in places outside the area where the event took place, particularly if multiple events occur simultaneously or in succession in a given location – this could be the result of damage to property, destruction of assets, loss of infrastructure and public services, social and economic disruption, and environmental degradation. Poverty also is a key risk factor, and the poor are disproportionately affected by extreme events.

Altered Timing and Location of Vector-Borne Disease. Climate change is expected to alter the geographic and seasonal distributions of existing vectors and vector-borne diseases, such as Lyme disease, West Nile virus infections, and other diseases spread by vectors like mosquitoes. Rising temperatures, changing precipitation patterns, and a higher frequency of some extreme weather events associated with climate change will influence the distribution, abundance, and prevalence of infection in the mosquitoes that transmit West Nile virus, the leading cause of mosquito-borne disease in the United States.  Outdoor workers are at a greater risk for contracting Lyme disease and, if working in areas where there are infected mosquitoes, occupational exposures can also occur for West Nile virus.

Increased Risks of Water-Related Illnesses.  Runoff from more frequent and intense extreme precipitation events will increasingly compromise recreational waters, shellfish harvesting waters, and sources of drinking water, increasing the risk that infrastructure for drinking water, wastewater, and stormwater will fail due to either damage or exceeding system capacity. Although the United States has one of the safest municipal drinking water supplies in the world, water-related outbreaks still occur—between 1948 and 1994, 68 percent of waterborne disease outbreaks in the United States were preceded by extreme precipitation events. Inequities in exposure to contaminated water disproportionately affects tribes and Alaska Natives, residents of low-income rural subdivisions along the U.S.–Mexico border, migrant farm workers, the homeless, and low-income communities not served by public water utilities—some of which are predominately Hispanic or Latino and African-American communities.

Increased Threats to Food Safety and Nutrition.  As climate change drives changes in environmental variables, such as ambient temperature, precipitation, and weather extremes (particularly flooding and drought), increases in foodborne illnesses are expected. In the United States, the Centers for Disease Control and Prevention (CDC) estimate that there are 48 million cases of foodborne illnesses per year, with approximately 3,000 deaths.  Rising levels of carbon dioxide in the atmosphere can actually lower the nutritional value of most food crops. Climate-change impacts on food production, food processing and utilization, food prices, and agricultural trade were recently addressed in a separate assessment report on Climate Change, Global Food Security, and the U.S. Food System.

Adverse Impacts on Mental Health.  The cumulative and interactive effects of climate change, as well as the threat and perception of climate change, adversely impact individual and societal physical and mental health and well-being.  Mental health consequences of climate change range from minimal stress and distress symptoms to clinical disorders, such as anxiety, depression, post-traumatic stress, and suicidal thoughts and behaviors.  The mental health impacts of extreme events, such as hurricanes, floods, and drought, can be expected to increase as more people experience the stress—and often trauma—of these disasters.  People with mental illness and those using medications to treat a variety of mental health conditions such as depression, anxiety, and other mood disorders are particularly vulnerable to extreme weather events and extreme heat.

Disproportionate Effects on Vulnerable Populations.  Every American is vulnerable to the health impacts associated with climate change.  People at every life stage have varying sensitivity to climate change impacts.  The most vulnerable populations include individuals with low income, some communities of color, individuals with limited English proficiency and immigrant groups, Indigenous peoples, children, pregnant women, older adults, vulnerable occupational groups, persons with disabilities, and persons with preexisting or chronic medical conditions.

NEW ADMINISTRATION ACTIONS RESPONDING TO THE
CLIMATE AND HEATH ASSESSMENT

President Obama has already taken action to combat the health impacts of climate change and protect the health of future generations. Just last year, the Administration:

Today, the Administration is announcing a series of additional actions to keep us on track to better understand, communicate, and reduce the health impacts of climate change on our communities, including: