SAN DIEGO -- Crews are working around the clock to repair a water main break on the San Diego State University campus that knocked out most of the school's air conditioning.

On Thursday, more cracks were found in the large water pipe that provides water to one of the main cooling systems on campus. Additionally, the lack of air conditioning on a relatively warm day forced some faculty members to be sent home early.

"I was in line and it seriously felt like I was at the gym. My hands were starting to get runny," said SDSU student David Garcia.

On Monday evening, an area around the school's library flooded due to the main break.

There is no word on what caused the ruptured main, and while the cleanup process was supposed to complete by Friday it now looks like it may go a bit longer.

"We are going to have to take it a day at a time to see how progress on construction goes, if the weather cooperates," said SDSU spokeswoman Gina Jacobs.

Crews learned Thursday the 24-inch pipe is cracked several feet from the break, meaning more work will need to be done.

In the meantime, those on campus used fans or propped open windows to keep cool. However, for the second straight day, faculty members who couldn't handle the heat went home.

"It's hard to concentrate. You use up a lot of water," said faculty member Carla McCann.

The campus will stay open while repairs are being done, and SDSU officials said they are working on a plan in case the air conditioning is not back on by Monday.

Monday will be incoming freshman Lauren Lorber's first day, and the AC situation has her concerned.

"It's that typical feeling of just controlled air. A lot of humidity, a lot of body heat; it's very sticky … a lot of circulation, not a lot of fun," she said.

SDSU officials said they don't have an estimate on how much the repairs will cost.