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

https://zaneooed824.lakeviewbrief.com/posts/what-proper-attic-decontamination-involves-after-a-rodent-infestation-2

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.