"It's patently unwise to bring a motorcycle indoors because of the flammable liquid in the gasoline tank," he said. "Even if people say they drain all the liquid out of it, there's still vapor."
It is the vapor, not the liquid, that ignites on contact with flame or spark, authorities pointed out in interviews Friday.
"Some people may feel insecure about leaving a motorcycle in a carport, but it's very ill-advised to bring it in your living unit for security," Cahill said.
Fire department officials contacted Friday had differing views on whether their local versions of the Uniform Fire Code strictly prohibit keeping vehicles, such as motorcycles, inside a dwelling. But they all agreed that the practice can have--and indeed over the years, has had--deadly consequences.
Regardless of whether the practice is barred by fire laws, said Capt. Mark Reinhold, Orange County Fire Deparment spokesman, building codes prohibit storage of vehicles inside dwellings.
The problem, however, is not in outlawing the practice, fire officials said, but making it clear to the public how dangerous it can be.