The Facebook video post appears to show the start of the fire in Ontario, California, with flames melting through the plastic wrapping of Scott toilet paper cases.
Edit: The Los Angeles Times source had a consent to arbitration pop-up banner for those not using an effective ad blocker, so I switched the link to an ABC San Francisco alternative.
Alternative to CBS.
Edit: The Los Angeles Times source had a consent to arbitration pop-up banner for those not using an effective ad blocker, so I switched the link to an ABC San Francisco alternative.