Record Heat and High Humidity to Grip Eastern U.S. Through Midweek
A surge of humid air combined with record-breaking heat is set to impact the Midwest, Northeast, and Mid-Atlantic regions of the United States. According to the Washington Post, temperatures are expected to climb into the 90s°F (32-37°C) across much of the East, with cities like Richmond, Washington, Hartford, and Philadelphia forecast to experience record or near-record highs. Nighttime temperatures will also remain unusually warm, with lows in New York City and Washington, D.C., predicted to stay in the mid-70s°F (23-24°C), exceeding typical daytime highs for this time of year. This heat wave is expected to persist through Wednesday, fueled by rising humidity levels. A cold front moving eastward will bring relief to most areas by Thursday, though the Southeast will continue to experience high heat and humidity. 
