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

https://storage.googleapis.com/my-home-blog/what-proper-attic-decontamination-involves-after-a-rodent-infestation.html

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.