My washing machine overflowed all over my house. There is water damage in 5 rooms. Is it safe to stay here while the repairmen dry it out?

If you're concerned about mold affecting your health, I think as long as have good air circulation there is little chance of harm. Keep the windows open as much as possible as the drying takes place, and use lots of fans to keep the air moving.

This has nothing to do with your question but every time I read your post I think of the movie the Marathon Man... if you've never seen it a Nazi dentist torture Dustin Hoffman and only asks him "is it safe?"... it makes me smile because a guy I used to work with would always sy that after any of us came out of the bosses office it was our groups inside joke

IT is safe. Like ebaines said, good airflow is the key.