If you just can't keep from enjoying from the outdoors, it's important to stay safe in the sun and hot temperatures.
This means drinking plenty of water and taking rest breaks.
The city of Watertown's fire chief says not doing that can lead to heat exhaustion or heat stroke.
One sign that you need help - you've stopped sweating.
"There may be some onset of weakness or vomiting. The skin will be very hot to the touch, almost like you're running a fever. Those are some other indicators that you're in that condition for potential heat emergency," said Watertown Fire Chief Dale Herman.
Herman says firefighters are extra cautious of heat safety when battling fires in their heavy gear.
They keep water and coolers of ice in fire trucks to help stay cool.