 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 weathermaker that's going to bring strong to severe thunderstorms later this afternoon into the evening. It will move from west to east, arriving in the metro area around 7, 8 o'clock tonight. Temperatures in the 90s, heat index values around 100 to 110. Tomorrow we're a little bit cooler, upper 80s to middle 90.