A dam at Lake Jackson in the Manassas portion of Prince William County is about 6.5 feet above normal, and two nearby residences have been evacuated, according to county officials.

Continuing rain in the area deluged the lake, which rose and sounded a “level III” alarm, said Kim Hylander, a fire and rescue department spokeswoman, who said the alarm goes off when the water rises more than 6 feet above normal. That triggers a mandatory evacuation for “certain low-lying areas,” she said.

However, fire officials said the water was receding Tuesday afternoon, and the evacuations were precautionary. No property damage has been reported.

The evacuation follows two fatalities on I-95 Tuesday morning and reports of rural area roads that had washed out.

A washout has been cleared at Aden Road and Misty Creek Court, which has been reopened, according to Virginia Department of Transportation spokeswoman Joan Morris. A bridge washed out at Trenton Court off Valley View Drive, but VDOT does not have control over that road since it is private, she said.

A washout at Fleetwood Drive and Slate View Court also has been cleared and the road reopened, Morris said.

Some Prince William County students had to find another way home from school on Tuesday afternoon because of flooded roads.

Buses at three schools were canceled: Brentsville District High School, Marsteller Middle School, and Nokesville Elementary School.

According to a statement from the school district, affected roads were: Aden Road between Route 234 and Fleetwood Drive; Aden Road between Marstellar Drive and Route 28; Hazelwood Drive; Old Church Road between Bridwell and Oxfordshire; Bristow Road between Windy Hill Drive and Lucasville Road; Valley View between Crockett Lane and Trenton Court; and Trenton Court.

More storms are predicted for the area after 5 p.m. Tuesday.