A Record-Breaking Heat Wave Is Sweeping Across the U.S. This Week. Here Are Some of the Cities It Will Hit Hardest

But for others, the highest temperatures are still ahead.

Experts forecasted that Wednesday will be the hottest day for much of the Northeast. In New York City, temperatures are expected to reach as high as 103 degrees Fahrenheit. In Philadelphia, it’ll be even hotter, with some forecasters predicting 107-degree weather.

Cities like Tempe, Arizona, and Phoenix, Arizona will continue to see temperatures reaching or surpassing 110 degrees Fahrenheit on Wednesday. And triple-digit temperatures are expected to drag on throughout the week in some cities, including Fort Lauderdale, Florida; Las Vegas, Nevada; and Brownsville, Texas.

In the latter part of the week, temperatures in the Northeast will start to drop to the 80s, according to AccuWeather. But as the heat wave subsides, another potentially hazardous weather phenomenon will come to parts of the U.S.: thunderstorms. Gusty winds and heavy downpours are expected to batter Wisconsin and the mid-Atlantic states, AccuWeather predicted.