Rodents often get under San Diego homes through torn crawl-space covers, open vents, gaps under doors, loose flashing

https://kameronumbm236.rivetgarden.com/posts/why-san-diego-s-climate-makes-roof-rat-proofing-a-year-round-job

Rodents often get under San Diego homes through torn crawl-space covers, open vents, gaps under doors, loose flashing, and openings where utility or A/C lines enter exterior walls.