Noun and する verb
そかい
空襲を避けるために田舎へ疎開していました。
They were evacuated to the countryside to avoid the air raids.
If a place has been neglected for too long you'll have to open the doors for evacuation of the building. Places can't stay nice forever and sometimes the safest thing is to get the heck out of there.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.