South Huntington School Superintendent David Bennardo said Wednesday that Hurricane Sandy created gaps in the ceilings of 16 classrooms, some locker areas and a wrestling room at Whitman High School.
As the hurricane blasted the area Monday evening, large chunks of roof material could be seen peeling away and flying through the air.
School officials were assessing the damage Wednesday morning.
Several workers were busy hauling away debris and yellow tape blocked access to one entrance.
One of the concerns was whether the return of students and staff to the building would impede repair work.
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Also at issue is the number of days the school districts can be closed and still meet the state-mandated minimum. Bennardo said that the state has, in previous cases, sometimes approved a waiver of the rule.
South Huntington's calendar exceeded the minimum by two days, giving the district a little more breathing room.