Rising Nighttime Temperatures Pose Health Risks

This week, extreme heat continues to threaten health as overnight temperatures remain high. The National Weather Service forecasts that over 90 temperature records across the U.S. may be tied or broken by Wednesday. Many of these will set new overnight heat records. Health authorities warn that the lack of cooling at night is especially hazardous compared to high daytime temperatures.

The U.S. faces a scorching summer start due to a persistent heat dome engulfing the nation. Recent heat has led to heat-related deaths in New Jersey and intensified wildfires in the West.

No Nighttime Relief

The National Weather Service indicates that temperatures in cities like Fort Lauderdale, Miami, Tampa, Galveston, and Charleston won’t dip below 80°F (27°C) at night. Even cities in the Midwest and Northeast, such as Fargo, International Falls, and Portland, will experience nighttime lows above 70°F (21°C). This lack of nighttime cooling poses severe risks.

Dangers of Hot Nights

Meteorology expert Marshall Shepherd from the University of Georgia emphasizes the amplified health risks caused by high nighttime temperatures, particularly for the elderly and vulnerable. Just a small rise in body temperature can result in heatstroke or cardiovascular stress.

“That’s where health outcomes are amplified,” Shepherd said, stressing the risks for vulnerable groups.

Kristie Ebi, a public health and climate scientist, notes that health risks manifest more often on subsequent days if the body fails to cool at night. She warns that mortality rates can increase within a couple of days during these conditions.

Proactive Measures Needed

Ebi advises monitoring for symptoms like excessive sweating, muscle cramps, and headaches. “It’s hard to realize trouble is brewing with the heat, hence proactive measures are vital,” she states. Using air conditioning or applying a cold towel can help.

Staying connected with friends and relatives, especially those more susceptible due to age or health conditions, is crucial during heat waves.

Coping Without Air Conditioning

For homes without air conditioning, relief is still possible. Visiting public places like libraries or malls, using a fan with water mist, soaking in cold water, or wearing damp clothes can help cool you down. Hydration remains essential.

Reporter Seth Borenstein in Washington contributed to this coverage.