 D.C. Mayor Muriel Bowser has extended the district's heat emergency through Thursday. That means the district's cooling centers and water spray parks are open for you to find some relief. Keep it here on WTOP for the latest every 10 minutes with traffic and weather on the 8th. 506 hundred medical students at Johns Hopkins University learned today their education will be free. It is all thanks to a $1 billion gift from philanthropist and former politician Mike Bloomberg.