 Presented by Window Nation. Buy two windows, get two free. Visit windownation.com. I'm Rob Stallworth, WTOP Traffic. Steve Rudin with the 7 News First Alert forecast. Excessive heat warning until 8 o'clock for the metro area in southern Maryland along with a heat advisory for all other areas also until 8 o'clock. We're tracking a weather maker that's going to bring strong to severe thunderstorms later this afternoon into the evening.