San Diego State University officials sent an alert to students and faculty informing them that a water main break off campus was prompting the cancellation of classes.
The alert went out at 11:03 a.m. Wednesday.
In a post to Twitter, SDSU announced: "Classes are canceled through 3:15 p.m. today, Sept. 12."
Classes after 3:30 p.m. Wednesday would resume as normal.
A 12-inch water distribution pipeline was struck by a contractor working near the intersection of Rolando Boulevard and University Avenue which affected water pressure in the College Area and Rolando neighborhoods, a spokesperson for the city of San Diego said.
At one point, the entire SDSU campus, including dorms, and some surrounding restaurants were without water.
Water service was expected to be restored to all customers by 10 p.m.
The campus remained open but non-essential personnel were encouraged to leave.
There would be no air conditioning in the buildings until further notice, school officials said. Several of the on-campus restaurants were closed.
Many students were leaving campus Wednesday afternoon. Some were complaining that there were no open restrooms on campus.
SDSU said the Conrad Prebys Aztec Student Union, East Commons and West Commons buildings had water, and that restrooms were being opened at those locations.
Portable bathrooms and hand washing stations were also brought on campus to service students until campus-wide water service returned.
SDSU officials said the university was in communication with the city regarding water service.
No other information was available.
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