Your first steps after a pipe bursts
If a pipe bursts, shut off the water if you safely can — at the fixture or the main shutoff valve — keep away from any water near electrical outlets, move belongings to safety, and contact your landlord's emergency maintenance immediately.
A burst pipe can flood a unit fast, so acting quickly limits the damage. If you know where the shutoff valve is, turning it off can stop the flow while you wait for help. Take photos and video of the burst and the spreading water, then report it in writing as an emergency so there is a record of the time.
Because burst pipes and the resulting water damage involve the plumbing and the structure, the repair and cleanup are generally the landlord's responsibility, including drying the unit to prevent mold. If your landlord fails to respond to a burst pipe, a free review can help you understand your options.
This is general information about California tenant rights, not legal advice. Every situation is different.