“You can get heat-related illness, especially in a home without air conditioning or an enclosed vehicle, even when temperatures are in the 70s,” says Dr. Hillary Irons, who practices at UMass Memorial Medical Center.
Massachusetts, like much of the East Coast, is sweltering under a heat wave. And with these stretches of hot days come the usual urgent warnings about heat-related illness. I’ve lived here for years, and try to heed these warnings, but I’ve always wondered: how exactly can heat hurt our bodies?
“You can get heat-related illness, especially in a home without air conditioning or an enclosed vehicle, even when temperatures are in the 70s,” says Irons, who practices at UMass Memorial Medical Center.The cascade of physiological changes heat can trigger begins with a sensor in the brain that reacts when your temperature begins to rise.
“You can have some swelling, particularly in the hands and the feet, what we call heat edema,” Irons says. Dehydration can trigger a series of problems, often starting with heat cramps.They occur, typically in the calves and thighs, if muscles don’t have the right balance of salts and fluids. And cramps may be a symptom of heat exhaustion as patients progress.
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