The first real heat wave of the summer is leaving its mark in the record books.
Dozens of records have fallen this week in cities from the Plains to the Eastern Seaboard; some of these records had been on the books for more than a century.
Meanwhile, high humidity made it feel more like the 105 to 110 for many areas from the Midwest to the East.
The heat and humidity became "squeezed" off the East Coast due to an approaching cold front, marking the end of the heat wave.
That front also helped spark some nasty thunderstorms before the day was out on Friday.
Here is a look at some of the more noteworthy record high temperatures from the heat wave:
* Ties the all-time record high for June, previously set on June 14, 2006.
Water is poured over Andrey Krivetc, 11, while he is buried in the sand in the Brighton Beach section of Brooklyn, N.Y., Thursday, June 21, 2012. (AP Photo/Seth Wenig)
Three-month-old puppies, Piper (top) and Emma, frolic in the cool waters of Joe's Pond during a heat wave on Thursday, June 21, 2012, in West Danville, Vt. (AP Photo/Toby Talbot)
The veil of night didn't offer much relief from the summer sizzler.
Heat that built up during the day was slow to escape in many metropolitan areas/concrete jungles from Kansas City to Boston. As a result, temperatures failed to fall much below 80 in many areas all night.
Even more impressive, AccuWeather.com RealFeel® temperatures, which factor in humidity, stayed at or above 90 in a few cities through the nighttime hours.
Here is a look at some cities that failed to fall below 75 for at least a couple of mornings this week:
^ Unofficial and as of 7:00 a.m. EDT Friday.
As Expert Senior Meteorologist Alex Sosnowski pointed out earlier in the week, relief is on the way to the big cities this weekend, and next week unseasonably cool air will set up shop across the East.
Showers and thunderstorms will return to the Southwest late this week and could reach part of California.
The late-season swelter will continue along much of the Atlantic Seaboard through the week as tens of millions head back to school and work.
An area of low pressure will bring a threat of heavy rain and flooding to parts of southern Europe through the middle of the week.
Life-threatening flash flooding and mudslides will occur across northeastern Mexico as Dolly moves ashore.
Following a warm, humid start for the first days of September, lower humidity and more pleasant conditions will return to the Pittsburgh area.
A cold front swinging into the Northeast will bring the threat of severe weather to part of the region on Tuesday afternoon.
Matecumbe Key, FL (1935)
Labor Day Hurricane hit Florida. Pressure at Matecumbe Key dipped to 26.35"/892.3 mb. Most intense hurricane ever to hit the U.S. with 200-mph wind. Tide of 15 feet; 408 dead.
Mecca, CA (1950)
126 degrees - highest ever for U.S. in Sept.
East Coast (1775)