A large sinkhole that opened Sunday in a Lake County neighborhood has been filled.

Groveland city crews emptied 25 dump truck loads' worth of material into the 65-foot-deep, 45-foot-wide hole, which opened near Iowa Avenue and East Waldo Street, about two blocks away from Cecil Gray Middle School.

The school opened Monday for the first day of classes, despite the large sinkhole.

A water main break caused by the sinkhole stopped service for people living in the area and prompted a boil water advisory.

Water has been restored, but a precautionary boil water notice remains in effect as of Monday evening for areas south of Highway 50 to Anderson Road, and west of State Road 33 to Lake Avenue.

Residents are advised to boil all water used for drinking, cooking, making ice, brushing teeth or washing dishes. A rolling boil of one minute is sufficient.

As an alternative bottled water may be used. Residents can pick up bottled water at Fire Station 95, located at 450 W. Orange Street. This boil water notice will remain in effect until the problem has been corrected and a bacteriological survey shows that the water is safe to drink.

One person had to be evacuated, but no one was hurt.

Raymond Burtoft, who lives in the neighborhood where the sinkhole opened, said it's not the first time a hole has opened on that spot.

"It happened about 45 years ago, but it wasn't near as big as it is today," Burtoft said.

Sinkholes are natural occurrences in Florida, according to the state Department of Environmental protection. They happen when underlying bedrock dissolves and are often triggered by extended periods of drought, then heavy rains.

They are especially prevalent in Central Florida and the Tampa Bay area.

Last week, a new sinkhole opened up at the site of a sinkhole that killed a Hillsborough County man. On Feb. 28, 2013, Jeffrey Bush, 37, was killed when a large sinkhole opened up beneath his bedroom at 240 Faithway Drive. That house and the two homes on either side of it were later demolished.

Jeff Bush died Feb. 13, 2013 when a sinkhole opened up underneath the bedroom of his home in Seffner. He was sleeping in his bedroom at the time. His body was never recovered.