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

https://charliegwuf511.northstarcolumn.com/posts/the-best-materials-for-permanent-rodent-exclusion-in-san-diego-homes

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.