Twenty billboards are going up around the Houston area to remind families about having working smoke detectors in their homes.

Houston firefighters said that one of every three residential fires in the city is at a home that had a malfunctioning smoke detector or no smoke detector at all.

The Houston Fire Department, State Farm Insurance, and Clear Channel Outdoors have funded the billboards.  

The signs read: "A $5 Smoke Detector Saved Our Lives! Install Smoke Detectors in Your Home Today!"

"Fire doubles in size every 30 seconds," HFD Assistant Chief Lisa Campbell said. "Although most fires are preventable, they do happen, and a working smoke detector gives you and your family the extra minutes needed to safely get out of your home."

Firefighters recommend residents check, change and replace. Check batteries at least once a month. Change batteries when you set your clocks forwards and backwards for daylight saving time. Replace smoke detectors at least once every 10 years.

"Just $5 and a few preparations could potentially save your family’s life," State Farm spokeswoman Patti Kelly said. "We're thrilled to be involved with this effort and we commend the efforts of Chief Garrison and all the members of the Houston Fire Department for their service to the community."