Its official: Arlington and the D.C. area will be under Extreme Heat Warnings over the next couple of days.
The National Weather Service just upgraded the earlier watch to a warning, in effect from 10 a.m. to 8 p.m. Thursday and Friday. Dangerously hot conditions with heat index values above 110 are expected, posing a risk to people and pets spending significant time outdoors — or in hot buildings or vehicles.