Hello from CNN, I'm Joe Beck, with the five things you need to know for Monday June 17th.

A long-lasting and wide-reaching heat wave is set to bring record-breaking temperatures to the Midwest and the Northeast this week.

The National Weather Service says it could be the longest one some areas have seen in decades,

and tens of millions of people who aren't used to heat this intense

will be sweating in temperatures well into the 90s.

CNN meteorologist Allison Chincha has more.

Yes, more than two dozen states have the potential to break record temperatures over the next five to seven days.

Some of these cities could do it multiple days in a row.

Now some southern cities like Atlanta, St. Louis, and Dallas already

started feeling the heat over the weekend, but now that warmth is going to

start to spread northward so areas of the Midwest and even the Northeast will

start to see their temperatures

begin to tick up pretty soon. But for places like New York, Albany, Boston, and

even Philadelphia, they'll peak Thursday or Friday 15 to 20 degrees above

average.

There were at least 14 mass shootings across the US over the weekend.

That's according to figures from the gun violence archive,

which says nine people were killed and dozens were injured.

The group counts a mass shooting as an incident where four or more people are shot, not

including the shooter themselves. One of those happened in Michigan on Saturday afternoon,

when police air gunman opened fire on a crowded recreation center in Rochester Hills.

The individual pulled up, exited a vehicle, approached the splash pad,

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