As Los Angeles residents fled their homes last week, a luxury real estate broker started compiling a list of all the homeowners he knew with empty second or third homes in Los Angeles and asking them to rent them.

“The conversation was very simple,” said Josh Flagg, the broker who is a star of “Million Dollar Listing Los Angeles.” “For the amount of time that you spend in L.A., you can go stay at the Beverly Hills Hotel” and rent out the house to someone who needs it.