An anonymous reader writes: Every time a city- or state-wide disaster strikes, services to help the victims slowly crop up over the following days and weeks. Sometimes they work well, sometimes they don't. Today, city officials in San Francisco and Portland announced a partnership with peer-to-peer lodging service Airbnb to work out some disaster-preparedness plans ahead of time. Airbnb will locate hosts in these cities who will commit to providing a place to stay for people who are displaced in a disaster, and then set up alerts and notifications to help people find these hosts during a crisis. The idea is that if wildfires or an earthquake forces thousands of people to evacuate their homes, they can easily be absorbed into an organized, distributed group of willing hosts, rather than being shunted to one area and forced to live in a school gymnasium or something similar.