A broken water main flooded parts of Coronado Tuesday forcing hours-long closures of multiple streets, according to city officials.
The flow of debris and water rushed dangerously close to businesses and transformer boxes.
Coronado Mayor Richard Bailey tweeted that the flooding was due to a large 16-inch water main that broke on B Avenue. A sinkhole measuring approximately 200 square feet opened up.
What caused the break is a mystery because it didn't happen at a turn or connection in the pipe.
"We really just don't have a great understanding of what caused it," Bailey said. "We have to wait for the waters to recede and the contractors to come out here to make that determination."
The City of Coronado said that the water to the broken main had been shut off at around 5:30 p.m., but the flooding it caused was bad enough to force an overnight closure of the 100 block of B Avenue.
B Avenue and the 1300 block of First Street were temporarily shut down around 3:50 p.m. First Street was expected to open at 2 a.m. Wednesday.
According to the Coronado Police Department (CPD), the main belongs to the United States Navy. Navy officials were on scene evaluating the damage.
The Navy Amphibious Base Coronado has two other water sources so it did not go without service during the mess.
The water supplier, California America Water, was requested to address the issue.
Police officers remain at the scene, redirecting the public around the flood, according to the city manager's office. They said the cement has been popped by the flooding in some areas.
Coronado's mayor said it may be a week until the road is reopened to traffic.