Most of the U.S. has more than 130 million people wary of the widespread, dangerous heat of Sunday and new work week, and parts of the southeast coast may experience stuffy conditions.
The highest temperatures on Sunday will be concentrated between Savannah, Georgia and Virginia Beach, where the high temperature warning is actually a heat index (i.e., the temperature that causes humidity to be considered) is predicted between 108 and 116 degrees.
Extremely high temperatures are expected to continue Sunday in the Midwest, where temperatures in Lincoln, Nebraska will be between 97 and 111 degrees until Minneapolis.
Visitors drink water while walking along the National Mall near the Washington Monument in Washington, D.C. on July 25, 2025.
Saul Loeb/AFP via Getty Images
Charleston, West Virginia and St. Louis, Missouri, both cities are feeling extreme heat warnings during Sunday's hot and viscous weather, as higher temperatures feel between 102 and 112.
Dangerous heat and humidity index graph.
ABC News
Elsewhere, hot consultations are also sent to Dallas, Texas. Oklahoma City, Oklahoma; Indianapolis, Indiana; Tampa, Florida; Little Rock, Arkansas; Kansas City, Missouri; Washington DC heat index is expected to range from the 1990s to 110 degrees.
Looking ahead to the work week, thermal consultation is expected to take effect Monday and Tuesday, part of the I-95 corridor from Boston to New York City, expected to extend into Tuesday, with a view to 105 degrees in the mid-90s.
The temperature is very similar on July 27, 2025
ABC News
The eastern half of the country is expected to continue life-threatening heat and humidity on Wednesday. Major cities including St. Louis, Memphis, Charlotte, Savannah, Tampa and Jackson, Mississippi may see actual temperatures from the upper level to the lowest of 100 in the 90s. These areas are expected to have prolonged heat waves, as there are many tropical moisture settlements over multiple consecutive days that will bring the sensory sample temperature to between 105 and 115 degrees.
Morning lows are predicting little calories are reduced this week.
ABC News
Night and morning are not expected to be relieved from stuffy conditions. Overnight and early morning lows are expected to fall to only the 70s or higher.
Thermal risks on Monday, July 28, 2025.
ABC News
Between Monday and Wednesday, most of the Southeast is expected to be at four quarters of high risk, including Atlanta, Charlotte and cities in Jacksonville, Florida and Tallahassee.
Meanwhile, parts of southern and central Minnesota and eastern South Dakota have been in severe thunderstorms until midnight. Northern Minnesota and parts of Northwest Wisconsin have been under severe thunderstorms until 1 a.m.
There may be more storms in the Upper Peninsula in Minnesota, Wisconsin and Michigan later Sunday.
With Sunday's thunderstorm attacks on the Northeast, 1,105 flights have been canceled nationwide, with 8,320 flights delayed as of 9:30 pm ET.