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

A brief thundershower helped keep a bit of a lid on the temperatures Sunday in Philadelphia, although many areas were indeed in the low 90s, kicking off the start of our first major heat wave of the year.

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.

With humidity, temperatures will feel like 100 to 110 degrees on Monday and Tuesday, the National Weather Service warned.

Boston and New England is in the midst of a three or four day heat wave. Temperatures will raise to the mid and upper 90s with high dew points pushing feels-like temperatures into the 100s.

Saturday was the first dry Saturday since March 15. Now, summer is coming in strong, with an extreme heat warning in place until Tuesday at 8 p.m. Click here for active weather alerts Sunday morning,