JEFFERSON COUNTY, Colo. — Interstate 70 and Highway 40 are closed in both directions from the Morrison to Lookout Mountain exits Wednesday morning due to a semitruck fire, according to Colorado State Patrol and the Jefferson County Sheriff's Office.

ALERT: I-70 and Hwy 40 are closed in both directions from the Morrison exit to the Lookout Mountain exit. A semi heading westbound is leaking hazardous materials. Hazmat crews are responding, and Colorado State Patrol is the lead agency. Avoid the area. It’s unclear how long the… pic.twitter.com/Jb1701oAha — Jeffco Sheriff (@jeffcosheriffco) August 27, 2025

Crews are working to put out a semitruck fire "involving some form of acid" on I-70, Colorado State Patrol (CSP) Public Information Officer Sergeant Ivan Alvarado told Denver7.

Due to

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