An omega block is setting up over Europe, strengthening a ridge of high pressure that will lead to at least a week of potentially dangerous heat.
A wicked combination of low humidity and strong winds helped the Sleepy Hollow Fire spread quickly into Wenatchee, Wash.
The extreme heat could be long-lasting, with the potential to span multiple days into late next week.
Temperatures reached the mid-90s across the region, just shy of record highs.
Tuesday is likely to be the hottest day of the year so far and it may close with a round of intense thunderstorm.
D.C.'s heat index of 103 at noon, highest in the nation, was only matched by Charleston, S.C.
Washington, D.C. is in the midst of its hottest late spring to early summer stretch on record, which shows little sign of relenting.
Should D.C. make it to 95, it will tie the daily record set in 2002
D.C.'s mid-afternoon temps are hotter than any other big city east of the Mississippi.
The late May siege of scorching temperatures is being blamed for 2,500 deaths, India’s second deadliest heat wave on record.