Tens of millions of people across the Midwest and East are enduring another sweltering day of dangerously hot temperatures as a sprawling June heat wave grips much of the U.S.

A multiday heat wave is bringing high temperatures and health risks from the Midwest to the Northeast, prompting warnings and emergency measures.

The Eastern United States has been hit by dangerously hot temperatures, which are expected to last until Wednesday. Local weather reports advise of possible life-threatening conditions from Minnesota to Maine and some parts of Louisiana,