Skip to Navigation
Skip to Content

Support PSR!

Make a difference in the challenge to confront global warming and prevent nuclear war and the development and use of nuclear weapons.

Donate Now »

Take Action

Coal ash is toxic. Tell President Obama that protection from coal ash contamination has to be robust, mandatory and nationwide.

Climate Change is a Threat to Health: Heat-Related Illnesses

As the average global temperature increases, heat waves are expected to become more frequent, more intense, and longer-lasting.

Exposure to extreme heat can have lethal consequences.  Heat can result in a reduction in or collapse of the body's ability to shed heat by circulatory changes and sweating.  The consequences may range from heat rash and heat cramps to heat exhaustion and heat stroke.

Severe cases of heat stroke may result in death.

The heat wave that struck Europe in the summer of 2003 claimed the lives of more than 22,000 people.  It was a tragic example of what may occur more frequently as global warming continues.

If a heat wave of similar magnitude were to occur in the United Sates, heat-related deaths would surge to more than five times the current national average. 

More frequent and intense heat also has other major health consequences. Long-lasting bouts of heat exacerbate stress and symptoms of mental illness, increase chance of dehydration, harm agriculture and the food supply, and increase ground-level ozone, which can inflict serious respiratory and cardiovascular harm.

The elderly, infants and children, and people suffering form chronic illness are especially vulnerable to heat-related illness, as their bodies are less capable of coping with the stress of excessive heat.

The urban poor are also vulnerable; they may not be able to afford the relief of air conditioning, which becomes necessary as cities become "heat islands." 

To learn more about heat-realted illnesses, download PSR's Heat Factsheet (PDF)