They call it a common gesture of courtesy to inform people that your home would offer itself to those fleeing some kind of devastation (oppressive regimes, abuse, earthquakes, etc.). However, most people don’t end up in that kind of humanitarian role. What’s the closest you have come?
After hurricane Maria devastated Puerto Rico a friend posted on social media asking if anyone could house his friend from San Juan. I was living in a house Brooklyn and I volunteered. His name was Robert and he was a really great dude. I really enjoyed hanging out with while he stayed. I told him he could stay as long as he wanted. He was such a boss that he had a chef job and his own New York apartment within two weeks.