TYLER-Emergency crews say they approaching Fourth of July holiday is usually they busiest time because of the heat.

Each year hundreds of East Texans are treated for heat stroke and heat exhaustion. And both can easily turn deadly if you don't know what to look for.

Doctors say warning signs for heat exhaustion include dizziness, cramping and not sweating.

And when you stop sweating, that's when you move into the heat stroke phase which is the more dangerous of the two.

The heat can also be dangerous for our furry friends as well. Pet owners are encouraged to make sure they have plenty of water and shade if they stay outside. And never leave your pets in a hot car.

Doctors at Trinity Mother Frances say when it comes to humans, the elderly and people who are constantly exposed to the heat are more at risk.

So how can you make sure you stay healthy this summer? Just remember three easy tips: hydration, decreased activity and shade.