The roof of a large water holding tank along Main Street in Clarence collapsed late Saturday morning, causing water to flood a surrounding field, Amherst Fire Control reported.
The tank, located behind the Harris Hill Fire Hall at 8630 Main St., split open after the roof collapsed just before 11 a.m. Saturday and emptied 1 million gallons -- its full capacity -- into the field and nearby drainage ditches.
Authorities do not believe there is any danger of nearby homes being flooded.
Officials also said there was no threat of a water shortage due to the rupture as the tank was used for reserve purposes only, and mostly during the summer. No injuries were reported.
The Erie County Water Authority was on location through the afternoon assessing the damage.
The exact cause of the roof collapse is unknown, but a top water authority official Saturday night speculated that it was caused by a massive failure in the bottom of the tank.