Heat Advisory in effect for DC metro area noon to 8 p.m. Monday

The National Weather Service has issued a heat advisory for the DC metro area from noon to 8 p.m. Monday, as heat index values could reach over 100 degrees.

Monday should reach peak temperatures, due to reach a high of 99 degrees.

The greater Washington metro region is affected, including Frederick, Montgomery, Prince George's, Howard, Anne Arundel and Baltimore Counties in Maryland, as well as Arlington, Fairfax, Loudoun and Prince William Counties in Virginia.

For DC, a Heat Emergency Plan is now in effect through July 2, as temperatures and heat index values will soar into mid-to-upper 90s.

The District has a list of open cooling centers.

Significant heat will continue into Tuesday. There are excessive heat warnings from the midwest to east coast due to high humidity levels.

If possible, you should try to stay indoors or in the shade. If you are out in the sun, be sure to drink plenty of water and use sunblock to protect your skin.

The NWS recommends anyone who will be outside should remain hydrated, limit strenuous outdoor activities, and wear lightweight, light-colored, loose-fitting clothing.

Additionally, beware of leaving children or pets in a locked car. Even with temperatures in the 80s, temperatures inside a car can reach over 100 degrees in 20 minutes.

FOX5 DC has the latest weather alerts, temperatures and forecast.