Heatstroke: A deadly hazard of summer

To avoid heatstroke, avoid strenuous physical activity outside during the hottest time of the day, if possible.

STORY HIGHLIGHTS

Heatstroke happens when your body can't regulate its own temperatureIt's important to seek treatment immediatelySymptoms include lack of sweating, vomiting, dizziness, confusion

(CNN) -- Michael Musick is all too familiar with the toll heat can take on the human body.

He was helping his father put up hay on their family farm three weeks ago when his vision began to blur. His legs became weak and his muscles cramped.

"If you keep pushing it, after you see the stars, then everything goes black and you pass out," said Musick, 46,