Health officials say the heat can be dangerous, especially for people with certain conditions.

”Patients with diabetes have to be really careful in the heat to really think even more than they normally do about the direction of their blood sugar,” said Dr. Bithika Thompson, an endocrinologist at the Mayo Clinic.

Doctors say seniors and children are at higher risk of heat-related illnesses, and hydration is the most important way to prevent them. They say drink a lot of water, don’t exercise during the hottest part of the day, seek shade and move your workout inside.

The Centers for Disease Control says symptoms of heat exhaustion include excessive thirst, profuse sweating, headache, dizziness or confusion, and nausea. The CDC says heat exhaustion can lead to heat stroke.

Symptoms of heat exhaustion include lack of sweating, body temperature rising to 106°F or higher within 10-15 minutes, or loss of consciousness. The CDC also says to seek medical help immediately if you are experiencing any of these symptoms.