The California Department of Public Health announced today that masks will still be required until June 15, when the State is expected to end most pandemic restrictions.
Read more from the State Secretary of Health and Human Services:
https://www.chhs.ca.gov/blog/2021/05/17/statement-from-chhs-secretary-dr-mark-ghaly-on-mask-guidance/
The best way to protect yourself against the virus is to get the vaccine. Find vaccination options at https://www.santa-ana.org/covid-19-vaccine-information.