WOW!

What is your travel company telling you? I would like to think that considering those situations that your agency would back you 100%! You didn't mention if you had contacted them yet or not, if not I would do so ASAP and tell them what is going on. If everything is so unsafe, I would hope that they would work with you on that. If you have anything that you can prove to them, I would think that they would not want the liability of something coming back on them if anything happens to you. If your company is unwilling to help you, I would look into other companies and secure yourself another spot somewhere with the new company before canceling with your current one.
Once you receive a contract with another company,and in another locale, then cancel this contract and let them bill you for the housing and dispute the housing bill legally if you have to based on these circumstances at a later date.
That way, you will at least be at another assignment and housed before you hae to deal with this.

Good luck!
Keep us posted!

Denise

cancel contract
you have to watch for retaliation from any hospital that bad, you may have to come up with a "family emergency" or something. when you get away, let us know where it is