A relentless heat wave gripped the country from the central states to the East Coast Saturday, prompting cancellation of the New York City Triathlon and producing cracked and buckled roads in some Plains states. Some East Coast cities braced for temperatures in the triple digits.
As the stifling heat ó expected to affect 200 million people ó settled in for at least a fifth day, the National Weather Service issued an Excessive Heat Warnings and Heat Advisory from parts of the Texas Panhandle to the Ohio Valley, around the Great Lakes, parts of the Mid-Atlantic and in the Northeast.
An Excessive Heat Warning is issued when the combination of heat and humidity is expected to make it feel like it is 105 degrees or greater.
Daytime temperatures in the mid to upper 90s or higher plus high humidity will result in heat indices as high as 115 for some, forecasters said.
Washington, D.C., Philadelphia, New York and Boston were bracing for weekend temperatures in the triple digits. New York City and Baltimore were under a Code Red Extreme Heat Alert that is expected to continue through Sunday.
"Itís been since July of 2012 that Chicago and Philadelphia both hit 100 degrees, and Washington, D.C., hasnít hit 100 since August of 2016," says AccuWeather Meteorologist Danielle Knittle.