A Heat Wave Is Hitting Much of the U.S. This Week. Here’s How to Stay Safe

Large swaths of the country are gearing up for — or already weathering — a major heat wave this week, with temperatures threatening to top 100 degrees in some places. If you live in an area experiencing these extreme temperatures, it's important to know how to keep yourself cool and healthy.

Here's what you need to know in a heat wave, according to Dr. Laura Burke, an emergency medicine physician at Beth Israel Deaconess Medical Center in Boston.