I don't have a clue as to the numbers you are asking for, but on another note, my DW and I got into a semi-interesting conversation.

On the NE corner of the intersection of Interstates 49 and 10 at Lafayette, La, there is a large motel that is now closed. This property is now surrounded by a Hurricane fence. According to the local newspaper (The Lafayette Advertiser), Homeless people took up residence after it had closed down, and trashed the place. Now the city wants it razed.

Our question is: Why can't FEMA purchase/take over such places, renovate them, provide a security and maintenance staff, and have them "activate" such facilities (with Salvation Army, Red Cross, other local groups, etc) when a disaster has forced people to be evacuated.

This would have been very useful during Hurricanes Katrina, Rita, Ike, etc. This could also have been used when a local major HazMat Incident occurred 2 years ago.

The only requirements I think that would be required are:
1) Proof of permanent residency is within the affected area(s),
2) All persons checked in/provided a room, are fully responsible for any and all damages to the room they have been issued.
3) A non-negotiable time limit should be established when such an Emergency Relocation Center is "activated".

Anyways, that's my 2 cents worth.