The National Weather Service in Birmingham, Alabama, warned that the heat will be accompanied by tumultuous weather.
“Like a broken record, today we will repeat the same forecast once again. Hot and humid conditions will persist with scattered or numerous thunderstorms.” the agency tweeted Monday.
There are also heat advisories in Minnesota, Virginia, North Carolina, South Carolina, Georgia and Florida.
High temperatures will also be a factor along the West Coast and in Southwestern states leading up to July 4.
The region already experienced a sweltering weekend, with triple-digit temperatures recorded in California, Nevada, Arizona and New Mexico.
The National Weather Service in Phoenix said high temperatures reached 115 F on Sunday in the city. That same day, temperatures in Las Vegas reached 110 F, tying a record for the shortest time between the city’s top 100 and 110 degree days, at two days.
“The only other time this happened was in 1955,” NWS Las Vegas tweeted Sunday.
the agency said temperatures will rise “well above normal” during the holidays, with triple-digit highs expected in several cities, including Las Vegas, Death Valley, Lake Havasu City and Bishop.
The region is not expected to see much relief until later this week.
“Trip-digit highs are forecast throughout the Central Valley region of California and the desert Southwest,” the National Weather Service said in its Monday forecast.
The heat is then expected to move into northern California and western Oregon, where the agency said “high temperatures are forecast to reach the 90s and 100s on Tuesday.”
The United States is not alone in experiencing an intense heat wave relatively early in the summer season. Parts of China, particularly the northern regions, have been sweltering in extreme heat. The capital, Beijing, is approaching 10 straight days of temperatures above 95 degrees, The Associated Press informed.
