And for most of America itll stay on through the rest of the month and maybe longer, meteorologists say.
Its not a record-breaking heat wave, but it is notable for its persistence.This is a dangerous type of heat where people need to be careful about heat stroke, stay indoors and drink plenty of water, meteorologists said.
The National Weather Service warned of excessive heat on Tuesday for 18 million people, but thats nothing compared to whats coming up.
And it will likely feel even hotter in the South.
Without extensive statistical and scientific analysis, meteorologists cant say for sure that the heat is due to global warming, Rosencrans said.