According to the Centers for Disease Control, about 300 people die each year from heat-related illnesses. And since our heat wave is hitting us late in the season this year, the key word to remember is prevention.
If you must be outside, drink plenty of water, take frequent breaks from exercise or work, and try to stay in the shade. Heat exhaustion occurs when you can't sweat enough to bring down your body temperature.
Warning signs include muscle cramps, fatigue, dizziness, weakness, headache or nausea. If you feel any of those, you need to get out of the sun and drink something.
In addition, the CDC says don't ever leave children or pets in the car, because even with the windows cracked, the temperature in there can jump 20 degrees in just 10 minutes.