Otherwise, a ceiling collapse could have been a major disaster.
It happened in Lido Beach, in Nassau County.
Concrete ceiling materials collapsed onto a covered parking lot, at Long Beach High School.
No injuries were reported, but crews searched the debris as a precaution.
The cause of the collapse is under investigation.
"In all likelihood it's some sort of structural weakness, and or some wind got underneath," said Superintendent David Weiss, Long Beach Public Schools.
"Thank God that nobody got hurt, the kids are safe, the teachers all park under there, someone could have been crushed, it's just incredible," said Laurie Daro, a parent.
The school has been undergoing renovations.
The superintendent says he does not expect any delay in its reopening after spring break ends.
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