 Air temperatures forecast to be at the century mark as well. That would be for the second time this year if we get there at Washington, D.C. Good news is the heat relief is already in sight. By Wednesday into Thursday, the boundary comes in with some storm chances and eventually a drop in temperatures Thursday. Already looking at a forecast high of 86 degrees. Right now it is 84 in Arlington, 83 in Tysons, and Germantown, 84.