Rodents can sneak into San Diego rooflines through small openings around eaves, attic vents, crawl-space vents

https://waylonhaay445.cavandoragh.org/why-san-diego-rats-invade-attics-in-the-summer-2

Rodents can sneak into San Diego rooflines through small openings around eaves, attic vents, crawl-space vents, and utility entry points that are not properly sealed.