Triple-digit heat scorching Houston area

HOUSTON (KTRK) -- Triple digit heat plus Houston humidity makes it feel even hotter outside. And if you've been out in it, you know it's brutal.

Just ask the Houston Fire Department. They they've seen a spike in 911 calls for heat-related emergencies, many of which we're told could have been prevented.

"You don't have to wait to start drinking water need to be drinking water before you go out," said HFD Medical Director Dr. David Perss, "So we talk about pre-hydration. We really stressed this for folks who work outdoors who're going to be in the sun, like the football players. They need to be hydrated before they go out. If you wait until you start getting thirsty, you're behind the curve. You dehydrate so quickly in this heat."

The primary concern is heatstroke, which is a life-threatening emergency. The doctor also says your specific physical condition, age and medical history directly affect how your body regulates heat. He has these three tips to stay safe:

Keep up with the temperatures wherever you go by downloading the ABC-13 weather app