Heat Advisory in Effect for Manassas Park

Manassas Park, Prince William County and most Northern Virginia are under a heat advisory from noon until 8 p.m. Tuesday, according to the National Weather Service.

The NWS forecast calls for the heat index to be in the 100s.

"A heat advisory means that a period of excessive heat is expected. The combination of temperatures in the mid to upper 90s and high humidity will create a situation in which heat illnesses are possible. The elderly, young children and pets are most at risk," NWS officials said.

A code orange air quality alert is in effect, which means pollution concentrations within the region may become unhealth for certain groups.