Records fall as last day of heat wave bakes Midwest, East Coast

PHOTO: A woman showers off on the beach on Saturday, July 20, 2019, in Ocean Grove, N.J. An excessive heating warning designated for this weekend is affecting nearly two-thirds of the United States.PlayKena Betancur/Getty Images
WATCH What is the Heat Index?

Ninety-four million people in parts of 23 states remain under excessive heat warnings and heat advisories on Sunday as one last day of scorching temperatures hits the Midwest and East Coast.

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Sunday is the last day of oppressive heat, with many places in the Upper Midwest already feeling cooler Sunday morning after heat indices of 115 to 120 on Friday and Saturday. That seasonably cool air will make its way east this week.

JFK International Airport and Atlantic City, New Jersey, both set daily record highs at 99 degrees Saturday, but most records being set are for the warm overnight temperatures. New York City and Boston are just two of many cities that set or tied record-high minimum temperatures, with temperatures failing to drop below 80 degrees.

PHOTO: Excessive heat warnings are in place from North Carolina to Massachusetts and Kansas to Ohio on Sunday. ABC News
Excessive heat warnings are in place from North Carolina to Massachusetts and Kansas to Ohio on Sunday.

Heat indices far surpassed the triple-digit mark across the eastern U.S. Saturday:

-Hartford, Connecticut: 110 degrees; actual high 95

-Washington, D.C.: 108 degrees; actual high 97

-Kansas City, Missouri: 109 degrees; actual high 98

-Baltimore: 107 degrees; actual high 100

-Boston: 107 degrees; actual high 97

-Chicago: 107 degrees; actual high 95

PHOTO: Overnight heat indices were still above 90 degrees from Washington, D.C., to New York City. ABC News
Overnight heat indices were still above 90 degrees from Washington, D.C., to New York City.

Heat index values continued to feel higher than 90 degrees overnight from Norfolk, Virginia, to Boston.

The excessive heat warnings remain in effect for Sunday, with heat indices reaching 110 degrees.

PHOTO: The heat index will be above 100 degrees from Charleston, S.C., to Boston on Sunday. ABC News
The heat index will be above 100 degrees from Charleston, S.C., to Boston on Sunday.

Actual temperatures will stay in the 90s for most of the East Coast -- often in the upper reaches.

Boston has another chance of hitting 99 on Sunday -- the hottest temperature since 2013.

Washington, D.C., could also hit 100 degrees for the first time since 2016.

PHOTO: After one more day of heat, the temperatures will cool down across the Midwest and East Coast on Monday. ABC News
After one more day of heat, the temperatures will cool down across the Midwest and East Coast on Monday.

The relief is finally making its way east, though.

It’s already significantly cooler across the Great Lakes and Midwest.

Chicago; Minneapolis; Des Moines, Iowa; and Detroit felt like 105 to 119 degrees. The high temperatures Sunday are in the 70s and low 80s.

Those temperatures will reach the East Coast early this week and there will be a nice break from the heat and humidity with below-average temperatures.

More severe weather possible

Several rounds of severe storms across the Midwest and Great Lakes have knocked out power to hundreds of thousands and caused widespread damage. There were over 430,000 customers without power Sunday morning across Wisconsin and Michigan.

There were more than 240 storm reports just from Saturday, and more than 450 storm reports between Friday and Saturday.

Winds gusted 70 to 80 mph and brought down numerous tree limbs, and thousands of power lines from South Dakota to Minnesota, and in Wisconsin and Michigan.

PHOTO: Severe weather is possible in northern Missouri and eastern Kansas on Sunday. ABC News
Severe weather is possible in northern Missouri and eastern Kansas on Sunday.

The severe weather will be focused around Missouri and Kansas again on Sunday. The main threat again is damaging winds, along with hail and also an isolated tornado.

Storms will be scattered from Missouri to Pennsylvania, but have the potential to be severe at times with damaging winds.