 D.C. Mayor Muriel Bowser has extended the district's heat emergency through Thursday of this week. That means district's cooling centers and water spray parks are open for you. In Fairfax County, the public school system has called off all outdoor activities for this evening. You want to keep it here on WTOP, we'll have the latest for you every 10 minutes with traffic and weather on the 8s. As our region continues to bake under the summer sun, the Gulf Coast and Texas...