An early-season heat wave is expected to build across the eastern U.S. from Monday through Thursday, bringing summer-like warmth to millions. Highs will surge into the 80s and 90s across the Southeast and mid-Atlantic, with cities like Washington, D.C. nearing record temperatures through midweek. While storms may limit heating in parts of the Midwest and Northeast, areas that stay dry will feel the strongest heat. The combination of rising temperatures, dry air, and gusty winds will also elevate wildfire risks across the Southeast during this stretch.