From the Centers for Disease Control and Prevention

People age 65 years or older are more prone to heat-related health problems. Older adults do not adjust as well as young people to sudden changes in temperature. They are also more likely to have a chronic medical condition that changes the body’s normal response to heat and are more likely to take prescription medicines that affect the body’s ability to control its temperature or affects the ability to sweat.

If you or someone you know, shows symptoms of heat-related illness — such as muscle cramps, headaches, confusion, fainting, nausea or vomiting — seek medical care immediately.

Here are some tips to stay cool and hydrated:

Stay in air-conditioned buildings as much as possible. Goodman Community Center is a great place to hang out when it’s too hot outside.
Do not rely on a fan as your main cooling source when it’s really hot.
Drink more water than usual. Don’t wait until you’re thirsty to drink. (If a doctor limits the amount of fluids you drink or has you on water pills, ask how much you should drink during hot weather.)
Don’t use the stove or oven to cook — it will make you and your home hotter.
Wear loose, lightweight, light-colored clothing.
Take cool showers or baths to cool down.
Do not engage in very strenuous activities and get plenty of rest.
Check on a friend or neighbor and have someone do the same for you.