4:30 p.m. Update: Interstate-70 through Glenwood Canyon has been reopened. The National Weather Service has lifted the flash flood warning.

Original story:

Interstate 70 is closed in both directions through Glenwood Canyon Sunday afternoon, Aug. 21, due to a flash flood warning, according to an email from the Colorado Department of Transportation.

The northern alternate route — which includes detouring through Silverthorne — will require approximately 2.5 hours additional travel time. Westbound motorists from the Denver metro area can reach the northern route via U.S. Highway 40, Colorado Highway 9 or Colorado Highway 131.

The flash flood warning is in effect until 4:30 p.m. Sunday. Eastbound and westbound I-70 are closed from Glenwood Springs (Exit 116) to Dotsero (Exit 133), with a second closure point for westbound traffic at Eagle (Exit 140). Eagle County residents will still have access to locations between exits 133 and 140 by using U.S. Highway 6. On the west side of the canyon, motorists continue to have access to Glenwood Springs and the Roaring Fork Valley.