Footage shows plumes of noxious chemical gases leaking out of crashed big rig near Tucson, Arizona.

Emergency alert message warned residents, ‘Turn off heaters, air conditioning units that bring in outside air’ – Hazmat incident comes in wake of toxic Ohio train derailment.

A portion of an Arizona freeway was closed in both directions Tuesday as a result of a crash and hazmat spill.

An overturned semi-truck in Tucson, Arizona, leaked noxious nitric acid, prompting officials to issue a shelter-in-place order for nearby residents.

Video of the hazmat incident on the busy I-10 freeway caught by passing motorists Tuesday showed plumes of dark orange smoke emanating from the site of the crash.

An emergency alert text message concerning the shelter-in-place orders warned residents to “Turn off heaters, air conditioning units that bring in outside air.”

“Individuals within 1 mile radius should shelter in place,” the alert added.

The Arizona Department of Public Safety noted early Tuesday evening they were still working to contain the event.

Meanwhile, a Tucson Hazmat team was spotted at the scene.

The latest hazmat scare comes in the wake of a massive airborne toxic event caused by a train derailment, and subsequent controlled chemical release, in East Palestine, Ohio.