The National Weather Service has issued a freeze warning for 2 to 9 a.m. Monday in the Pittsburgh area, with temperatures expected to dip into the lower 30s.
Clearing skies and light winds under building high pressure will allow temperatures to drop below freezing during the early morning hours.
With subfreezing temperatures imminent or highly likely, residents of Forest Hills, Swissvale, Edgewood and Regent Square area might want to take action to protect outdoor plants. The freeze warning means that crops and other sensitive vegetation will likely be damaged or killed, according to the National Weather Service.
Exterior plumbing fixtures may also be affected.