clarification of Tax filling and payment extension for California residents affected by the severe winter storms

I understand that many California residents, including specifically those in San Mateo county, have now until Oct. 16, 2023, to file various individual tax returns and make Federal and State tax payments... Is this correct? ... if so, do i still need to file any form with IRS and/or FTB to get such an extension or this is an automatic extension without the need for any further action on my part?