Top weather news for Monday, June 23, 2025: A dangerous heat wave is set to sizzle the eastern half of the U.S. for the first half of the workweek. Meanwhile, the National Hurricane Center is tracking Invest 90L in the central Atlantic that could become a short-lived tropical depression or tropical storm on Monday.
The first major heat wave of the summer is firing up across the eastern half of the U.S. this week, with major cities along the Interstate 95 corridor like Washington, Philadelphia and New York City flirting with 100 degrees.