Climate change

Washington Post -  A heat dome was strengthening above the Ohio Valley early Wednesday, with more than 150 million Americans covered by heat alerts from the National Weather Service.  This sprawling area of hot air will soon move eastward and spend Thursday to Saturday squarely over the Mid-Atlantic, sending temperatures toward 105 degrees there, and breaking records from Florida to Maine.

So far, the most intense heat and humidity from this weather system have occurred in areas where such conditions aren’t common. On Tuesday, parts of the Midwest experienced higher humidity than some of the world’s muggiest places. Stretches of Illinois, Indiana, Iowa, Minnesota and Wisconsin experienced humidity that rivaled or even exceeded that of Dubai, a notoriously humid city on the Persian Gulf.