He recommends limiting time outdoors. For those who have to do any strenuous activity outside, he advises doing it in the early morning, evening or simply putting it off until the end of the week when the temperatures are lower.
Such high temperatures can put people at risk for heat exhaustion or heat stroke, which can be fatal. The elderly, infants, children and people with chronic medical conditions are the most prone to heat stress.
Heat exhaustion is the body's response to an excessive loss of water and salt, usually through excessive sweating, according to the U.S. Centers for Disease Control and Prevention.
Symptoms of heat exhaustion include extreme weakness or fatigue, dizziness, nausea and fast and shallow breathing.
Heat stroke is even more serious and happens when the body becomes unable to cool down, the CDC says. It can cause death or permanent disability if untreated.
Heat stroke symptoms include hallucinations, chills, confusion and dizziness, along with slurred speech.
To protect against heat stress, the CDC advises spending time in air-conditioned places, staying informed of heat warning and drinking lots of fluids.