Climate Change and Health Equity

Climate change refers to a significant change in the Earth’s climate for an extended period of time. This includes changes in global temperatures and precipitation patterns, which can influence extreme weather and natural disasters. While disaster preparedness cannot prevent the effects of climate change, it can reduce the impact on individuals and communities.

Learn about the HHS Office of Climate Change and Health Equity (OCCHE), and review their Climate and Health Outlook for how we may be affected in the coming months by climate events.

Extreme Weather & Climate-related Disasters

Climate change affects every individual and community across the country, but the extent of these effects varies across regions. More frequent and intense extreme weather and climate-related disasters are expected to continue, creating new risks and worsening existing vulnerabilities in communities. Here are the environmental effects of climate change in recent decades:

Heat Waves: Heat waves are abnormal periods of extreme heat that can last from days to weeks. The rise in temperature from climate change has led to more frequent and intense heat waves across the country, especially in the Midwest and Southwest. Heat also increases the risk for other types of disasters such as droughts and wildfires.

Droughts: Some regions are experiencing record periods of extreme drought and less rainfall also due to the rise in temperature from climate change. Droughts affect the water stored in lakes, rivers, wetlands, underground aquifers, etc., and in turn can lead to water shortages.

Wildfires: Wildfire risk is dependent on several factors, including temperature and soil moisture. Climate change creates warmer temperatures and drier conditions, which can increase the risk of wildfires and ability to put them out.

Severe Storms: As the temperature rises, more moisture evaporates into the atmosphere, resulting in heavier rainfall and stronger winds, which has led to more frequent storms across the country. This especially affects regions where disasters such as hurricanes and wildfires have not occurred as often. In return, they are less prepared for a severe storm to strike.

Flooding: Floods are caused by several climate-related factors including extreme or prolonged periods of rain or snow, thunderstorms, storm surges from hurricanes, and snowmelt. The continual rise in sea level in combination with high tides and storm surges could increase flooding in certain regions.

Tropical Storms & Hurricanes: Warmer ocean temperatures and more heat in the atmosphere can lead to increased wind speeds of tropical storms and create longer, more destructive hurricane seasons. As temperatures continue to rise, hurricanes move farther north, which puts new communities at risk.

Health Impacts

Certain individuals and communities are particularly vulnerable to the impacts of climate change. These populations are often disproportionately affected by, and less resilient to, the health impacts of extreme weather and climate-related disasters. Here are some of the mental and physical consequences:

• Behavioral health issues resulting from climate-related disasters may include stress, anxiety, depression, posttraumatic stress disorder, and increases in both substance use and violence. Older adults, children, and individuals experiencing homelessness are more likely to be psychologically vulnerable to disasters.
• Populations particularly vulnerable to climate change include older adults, children, pregnant women, individuals experiencing homelessness, persons with behavioral health conditions (e.g., those taking certain psychiatric medications), people with lower incomes, individuals with limited English proficiency, migrants or refugees, communities of color, and tribes and indigenous peoples (PDF | 3 MB).
• Areas that depend on natural resources and favorable climate conditions such as tourist or agricultural and rural communities (PDF | 2.8 MB) are most vulnerable to the economic impacts of climate change.
• Climate change disrupts many areas of life and may lead to increased violence and crime, decreased community unity, and increased social instability.
• Individuals who contemplate the magnitude of climate change may also experience anxiety and grief about climate change, general despair, or hopelessness.