A crumb from Hurricane Harvey

Jim McIngvale, also known as "Mattress Mack," owns two furniture stores in Houston. He built both stores on elevated concrete to make them flood proof. As the city started to flood, he posted a video online with a simple message, "Come on over." He also gave out his personal phone number. Before long, hundreds of people streamed into his stores for shelter.

"We sell home theater furniture, and they're sleeping on that," McIngvale said. "Sleeping on recliners, sleeping on sofas and love seats. We have sleeper sofas. They pulled them out to sleep on them. They're sleeping on hundreds of mattresses throughout the store, and on couches, and God bless 'em. McIngvale also has food for evacuees, and he invited them to bring their pets too. "Think a slumber party on steroids," he says.