I investigated about crows in native american culture, where they actually have positive meanings. Crows represent methamorphisis (ha, Kafka), knowledge and are the ones who move the sun (don't remember if moon as well).
Interesting how no one mentioned that a flock of crows is called a murder.
Silent Hill is like a living thing and the fans are it's blood.
Silent Hill will lose blood time to time but it won't die that easily.
It can still make new blood.