High temperatures across the Plains, Midwest, Mid-Atlantic and Northeast are expected to hit at least 15 degrees above normal next week and will mark the hottest temperatures of the year to date, rising well into the 90s. With humidity, it could feel as hot as 110 degrees — especially in the Mid-Atlantic.

A heat emergency will go into effect in Boston on Sunday as temperatures climb into the mid-90’s, but feel like they are up to 100 degrees.

Weather forecasters have warned of extreme and dangerous temperatures as a major heat wave sweeps across the central and eastern U.S. states.

A large heat dome will dominate the weather pattern across the eastern two-thirds of the nation into late June and will produce more than record-smashing temperatures, as severe thunderstorms will continue.

What We’re Tracking After a humid and mild night last night with lows in the upper 70s to low 80s, today will be almost a repeat of yesterday. Summertime heat made itself known on the first day of summer with heat index values reaching up to 106°,