Our record heat could be dangerous — or deadly. Here’s what you need to know.

“People in the pool tend to think, ‘how can I be dehydrated?’ ” Hernandez said. “They don’t realize that alcohol is a natural diuretic, so even if you are in the water, if you are drinking alcohol you can get dehydrated.” Dehydration, she notes, can cause dizziness or headaches and even lead to fainting.