The best way to prevent fire and injury is maintenance. Remarkably, few people are even aware that BBQ maintenance is necessary. But, it is.
Every spring, experts say you should clean out the venturi tubes. Those are the little metal pipes that carry propane or natural gas. Pipe cleaners work well, although hardware stores also carry specialized tools for this purpose. The goal is to clean out any builtup dirt and debris. Don't be surprised if you find spider webs inside a venturi tube!
Your BBQ grills should also be cleaned with soap and water each year. Just scraping them before barbequing isn’t enough. Fat and oils from cooking can build up on grills and harden. If you're getting a lot of flare-ups, this may be the cause.
Finally, make sure nuts and bolts are tightened regularly, and replace any rusty hardware. Regular use, heat and weather can loosen or weaken bolts, particularly on the frame. Several fires each year are caused by BBQs tipping over or collapsing.