 When you factor in the heat and the humidity, it's probably going to make it feel a little bit hotter and hence a little more dangerous out there. Heat index values now up to 110. We were saying 103 to maybe 108. Now maybe 110. An excessive heat warning will be in effect for the immediate D.C. region today starting at noon. A heat advisory will be in effect in the rest of the region, including spots like Upper Montgomery, Frederick County, Maryland, and Loudoun County. Keep listening to WTOP for the latest on this heat wave with traffic and weather every 10 minutes on the 8th.