Cal Fire officials are reminding the public that starting today, July 1, state law requires carbon monoxide detectors to be installed in every home.
The new law requires all single-family homes with an attached garage or a fossil fuel source to install the alarm devices.
Fire officials said this new measure will save lives.
"Carbon monoxide is a silent killer, each year claiming the lives of an average of 480 people," state Fire Marshal Tonya Hoover said in a statement.
More than 20,000 people are sent to emergency rooms by the colorless, odorless gas, fire officials said.
Authorities say the best protection from carbon monoxide poisoning is to have a detector installed on every floor and outside each sleeping area.
More information on carbon monoxide poisoning prevention is available at www.fire.ca.gov.