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Employee Detained After Six‑Alarm Fire Guts Kimberly‑Clark Ontario Warehouse

A massive six-alarm fire tore through a 1.2 million‑square‑foot Kimberly‑Clark consumer goods warehouse in Ontario, California, early Tuesday, and authorities say an employee is in custody as they investigate the blaze as suspected arson. Crews from Ontario Fire Department, San Bernardino County Fire and multiple neighboring agencies responded around 12:30 a.m., finding flames already ripping through the roof and quickly spreading through paper products such as tissues stored inside. About 20 employees were in the facility when the fire broke out, but all escaped without injury, according to local reports. By around 5 a.m., firefighters had shifted to a defensive strategy, surrounding the building with ladder trucks and dousing it from above as the fire continued to burn. Deputy Chief Mike Wedell said the internal sprinkler system was working but the fire grew "exponentially very quickly," forcing interior crews to retreat, while officials confirmed that one employee suspect was arrested and is awaiting questioning by Ontario police detectives.

Industrial Fires and Public Safety Crime and Corporate Facilities

📌 Key Facts

  • A six-alarm fire erupted around 12:30 a.m. on April 7, 2026 at a 1.2 million‑square‑foot Kimberly‑Clark warehouse in Ontario, California.
  • Roughly 20 employees were inside when the blaze began; all escaped without reported injuries.
  • Authorities are investigating the incident as arson and have detained an employee identified as a subject of interest, who has been arrested and taken for questioning.

📊 Relevant Data

From 2017 to 2021, United States fire departments responded to an estimated annual average of 36,784 fires at industrial or manufacturing properties.

Fire in Industrial or Manufacturing Properties — NFPA

From 2017 to 2021, 3% of structure fires in manufacturing properties and 11% in industrial properties were classified as intentional.

Fire in Industrial or Manufacturing Properties — NFPA

As of 2022, 68.6% of the population in Ontario, California, is Hispanic, compared to 59.9% in 2000.

Ontario, CA — Data USA

In the Inland Empire region of California, Latinos comprise 61% of workers in the transportation sector, which includes warehousing, compared to 55% of the overall regional workforce as of 2022.

Latino Workers in the Inland Empire — UCLA Latino Policy & Politics Institute

📰 Source Timeline (1)

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