This can vary from state to state and even town to town.
Most places the tenant will still have to go through eviction procedures before being booted. In some foreclosures, if the bank ends up holding the house, the bank will be happy to have a month to month tenant, but not so happy with a lease.
You can likely find out online when the house is due for foreclosure.
You get a 7 day free trial at this site
http://www.realtytrac.com/pub/landin...mized_c_or.asp and can search for that house and see details. Make sure you follow the rules so you don't get charged.