DC Heat Advisory: Dangerous heat index values could reach 109 degrees Friday

DC Heat Advisory: Dangerous heat index values as high as 106

A Heat Advisory is in place across the D.C. region with heat index values as high as 106 degrees and the chance of thunderstorms.

WASHINGTON - A Heat Advisory is in effect across the D.C. region on Friday, with heat index values expected to reach up to 109 degrees and a slight chance of afternoon thunderstorms.

Heat Advisory Friday

The advisory runs from 11 a.m. to 8 p.m. and covers the District, and most of northern Virginia and central Maryland.

What we know:

The National Weather Service urges residents to stay hydrated, remain in air-conditioned spaces, avoid direct sunlight and check on relatives and neighbors. 

Outdoor precautions include wearing light, loose-fitting clothing and limiting strenuous activity to early morning or evening hours. Be alert for signs of heat exhaustion or heat stroke.

Isolated showers and thunderstorms are possible after 3 p.m.

Weekend outlook

The hot and humid weather continues into the weekend, with highs in the 90s and a chance of evening showers or storms both Saturday and Sunday. Temperatures are expected to remain in the 90s through at least midweek.