EAST MEADOW - Temperatures soared into the 90s across Long Island Wednesday, making it not only uncomfortable, but also potentially dangerous.

Toxicologist Dr. Dean Olson advises to limit physical activity and drink plenty of fluids during these conditions.

The NUMC doctor says people sweat a lot on hot days and that there can be problems if someone stops sweating.

"Their body can no longer sweat," he says. "And that's sort of the beginning of heat stroke, and that can be very serious, if not life-threatening."

Dr. Olsen recommends drinking at least 1 to 2 liters of water a day. Staying hydrated is an important way to stay out of the hospital, especially when the heat sticks around.

He says a lot of patients are feeling dizzy, weak or nauseous, so he recommends using air conditioning or finding a public place that has air conditioning.