- The East Coast should see some letting up soon.
- Parts of the west will see a more dramatic letting up of the heat.
- The heat is due in part to a persistent high-pressure system, also called a heat ridge or dome.
After an unusually oven-like June, the beginning of July has been sweltering, too. The heat didn't even take time off for Independence Day, with 262 daily high records tied or broken nationwide, mostly in the Midwest and the South, according to government records. In comparison, only 60 records were set on July 4, 2011, and a mere 15 were set on that date in 2010.
In addition to extreme heat during the day, it's not cooling off very much at night; in the first four days of July, 432 daily minimum high temperatures have been set (minimum high temperatures generally reflect nighttime conditions).
But there's a small amount of good news for those who are cooking in Chicago or withering in Washington, D.C. (both of which nearly broke all-time highs yesterday): a "cold" front will be sliding east across the country, said National Weather Service meteorologist Greg Carbin. That should bring slightly cooler weather and possibly precipitation to the Midwest and surrounding areas by the beginning or middle of next week, Carbin told OurAmazingPlanet.