Several houses in Houston listed on Airbnb are listed as $0 right now to help flood victims, following last weeks storms. Airbnb activated its Disaster Response tool that allows hosts to list their homes for free to aid displaced flood victims. Free housing will be offered through Airbnb until May 14. "We are heartbroken at the events unfolding in Houston and our thoughts are with the community, the victims and their families," said Airbnb spokesman Nick Shapiro.