1. Be Informed: Be informed about emergencies that could happen in your community and identify sources of information in your community that will be helpful before, during, and after an emergency. Register with AlertOC to receive emergency notifications in Yorba Linda. Access Ready.gov to learn what to do before, during, and after an emergency.

The Santa Ana winds fanning wildfires that have killed at least 25 people in Southern California and destroyed more than 10,000 houses, businesses and other structures in Greater Los Angeles are flaring up again.

The winds fueling Southern California wildfires form when a high-pressure system develops over the Great Basin in Utah and Nevada