D.C. Public Schools closed a Northeast high school Wednesday because of an air-conditioning outage.

The building-wide outage shut the doors of H.D. Woodson Senior High School on 55th Street NE, according to a Wednesday morning alert.

The alert said all other D.C. schools are open.

With the school year beginning last week, the high school opened its doors to more than 760 students.

The thought of the day on a social worker’s voicemail at the high school is a famous  Benjamin Franklin quote that says it’s better to stop something bad from happening than to deal with it after the fact.

“An ounce of prevention is worth a pound of cure,” said the tenth grade social worker in the message.

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