Think Progress: The heat dome that enveloped Washington, D.C. for much of the last week, so miserable it even prompted Metro to temporarily lift its ban on passengers drinking water aboard its trains, also broke a long-standing heat record.
For over five and a half days, the temperature was least 80 degrees in D.C. This 138-hour streak is the longest on record, dating back to 1871, and besting the 128-hour streak of two years ago.
As Jason Samenow of the Capital Weather Gang notes, this record is just the...