Washington DC extreme heat wave prompts Fourth of July weather warnings

An Extreme Heat Warning remains in effect from 10 a.m. Saturday through 9 p.m. this evening, with dangerously hot conditions expected across the region. FOX 5's Tucker Barnes says heat index values could reach 110 to 115. The warning covers Washington, D.C., along with portions of central, north‑central, northeast, northern and southern Maryland, and central, northern and northwest Virginia.