According to CBS News reports, a large fire broke out at a Kimberly-Clark warehouse in Ontario, California, in the early hours of Tuesday, April 2026. 

Firefighters responded at around 1:45 a.m. and found heavy smoke and flames across the building. 

The 1.2 million square-foot warehouse contained paper goods, which helped the fire spread quickly.

More than 140 firefighters were deployed.

Crews used a defensive strategy to control the fire.

No injuries were reported, and about 20 people were evacuated. 

Authorities said the fire is being treated as arson.

A suspect, an employee of a third-party distributor, has been arrested.

The fire was brought under control, but crews remained on site to deal with hotspots. The investigation is ongoing.