That’s an impressive feat when you consider heat advisories and heat warnings have been posted from Virginia to Maine.
The core of the heat wave has set up over the mid-Atlantic and Northeast due to the position of high pressure - or descending air (which warms as it compresses) - at upper levels. Today, it’s smack dab over the region covering northern Virginia to central Pennsylvania.
Forecast highs from Richmond to Portland are in the 90s to near 100 with heat indices of 100-105.
Today’s high so far of 93 degrees in D.C. makes it the hottest day of 2012 and hottest since August 9, 2011.
(Note: the weather.com map above includes just a sampling of U.S. weather stations - mostly major cities - so it’s possible there are hotter spots in between)