Firefighters Withdraw as Massive Paper Warehouse Engulfed in Flames, Roof Collapses

In Ontario, a catastrophic fire erupted at a Kimberly Clark paper products facility, leading to a roof collapse. Firefighters were forced to withdraw as flames rapidly engulfed the enormous 1.2-million square foot building.

Incident Overview

The fire broke out on April 7, 2026, at approximately 12:30 a.m. When the fire department arrived, around 20 workers were inside the facility located at the intersection of South Hellman Avenue and Merrill Avenue.

Rapid Fire Growth

Firefighters faced fierce flames that spread “exponentially,” overwhelming their initial response efforts. Ontario Fire Department Deputy Chief Mike Wedell stated the situation necessitated an “operational retreat” for safety reasons.

Firefighting Efforts

By 6:30 a.m., the fire continued to blaze, emitting a noticeable glow and plumes of smoke visible from miles away. Fire crews surrounded the building and pumped 1,000 gallons of water per minute to combat the inferno.

Investigation and Suspected Arson

Authorities are treating the incident as a suspected case of arson. One individual has been taken into custody in connection to the investigation. Further details about the suspect or motives have not yet been disclosed.

Deputy Chief Wedell indicated that firefighting efforts would persist throughout the day as crews worked to control the fire completely.