BALTIMORE, MD—A record-breaking heat wave is expected to expand from the Midwest and Great Lakes to the Northeast and Mid-Atlantic states this week, potentially lingering through early next week.

The National Weather Service says the duration of this heat wave is notable and potentially the longest experienced in decades for some locations.

Widespread daily high temperature records and a few monthly records for June are possible from the Ohio Valley to the Northeast from Monday through Saturday, with local maximum heat indices approaching 105 degrees. Warm overnight temperatures only dropping into the mid-70s will offer little to no relief, especially to those without adequate or reliable cooling.

High temperatures in the Baltimore area are expected to be in the 90s through this week with temps approaching and/or reaching 100 throughout the weekend.

Additional information can be found in the graphic below.