Air conditioning failed at Maricopa High School during an excessive heat warning. Photo by Raquel Hendrickson

On what is forecast to be a record-breaking day of heat, students at Maricopa High School attended their second morning of classes without properly functioning air conditioning Tuesday.

According to a statement published to social media by the Maricopa Unified School District at 10:23 a.m., a power surge was the culprit that caused the high school’s “main chillers” to shut down.

Maintenance workers restarted the equipment and restored the air conditioning.

“The temperature has gone back to an acceptable level,” according to the statement.