6-alarm blaze engulfs massive Ontario warehouse, arson suspected

Firefighters are battling a massive 6-alarm blaze that was believed to be intentionally set in Ontario early Tuesday morning. Erin Myers reports for the KTLA 5 Morning News on April 7, 2026. Watch KTLA streaming live on the free KTLA+ app for Roku, Fire TV, Apple TV and Samsung Smart TVs: https://ktla.com/watch-ktla-on-roku-apple-tv-amazon-fire-tv/