More than 100 million U.S. citizens have been advised to stay confined within the walls due to the extreme heat.
More than 107 million people, or one-third of the US population, have been warned that extreme heat and high humidity can be dangerous to get out of the confines of the walls and it is best to stay indoors.
A total of 125 million people have been alerted to take precautionary measures against heatwave.
According to the US Meteorological Department, getting out of the fence at this time can be dangerous for everyone as it can increase the risk of heatstroke related diseases.
Temperatures rose sharply across the United States, but the southwestern region was the hardest hit.
In the city of Las Vegas in the state of Noida, the temperature reached 43 degrees Celsius, which is equal to the record temperature of 1956.
The city of Denver, Colorado, recorded a temperature of 38 degrees Celsius, the highest since 2013.
Residents of Phoenix, Arizona, are struggling with extreme heat, with 43 degrees Celsius recorded for four consecutive days.
The heat has also intensified in the Midwest region of the United States, prompting authorities to take various measures to protect people.
Three women were killed in a heatwave in Chicago in May, prompting the opening of cooling centers across the city.
Cooling centers are also operating in Detroit, Michigan, and citizens have been instructed to take shelter in them to avoid heatstroke due to extreme heat and high humidity.
According to the Meteorological Department, the heat wave will continue for the next few days and the current temperature could prove fatal for everyone.
