NOTTINGHAM, MD—After a very brief respite from the summer heat, warm temperatures and high humidity will return this weekend and persist into next week.

A southerly flow will pump humidity from the Gulf of Mexico into the Mid-Atlantic states just as temperatures start to creep back up this weekend.  Heat indices will likely be in the low-to-mid 100s for much of next week.

Friday’s high temperature will be around 91 degrees, and temperatures will then climb into the mid-90s through at least the middle of next week and could even hit 100, according to the National Weather Service.  Monday’s heat index could be in the 105-110 range.

Forecasters say this could be the hottest air mass so far this summer, as temperatures will be 5 to 10 degrees above normal for this time of year.

Residents can download the free OSHA Heat Safety app to monitor local temperatures and heat indices.

For more heat safety tips visit the National Weather Service’s heat safety page here.