What is that red sign on the old James Alan building?

Readers have noticed signs which appeared on the old James Alan Salon on 185th and Fremont Ave N, and buildings on Bothell Way in Kenmore.

According to Melanie Granfors of Shoreline Fire, these placards were put up by the Fire Marshall's Office and are an international symbol to alert emergency workers that the building is empty.

Photos by Diane Hettrick