Interstate 10 in Tucson reopens following fatal crash, toxic spill

Feb 15, 2023, 8:04 AM | Updated: 8:26 pm

PHOENIX — Interstate 10 in Tucson reopened in both directions Wednesday evening after a fatal crash involving a toxic spill shut down the freeway for more than a day.

A shelter-in-place order was lifted around 5 p.m. for the area where a wreck caused a nitric acid spill on the I-10 a day earlier, while existing evacuations remain in effect.

Those within a 1-mile hazard zone in the southeast part of the city were told to stay indoors around 1:35 p.m., according to an Arizona Department of Public Safety update. About five hours earlier, people within 3 miles of the incident were told to stay inside because of the health risk.

I-10 has been closed in both directions between Kolb and Rita roads since a truck tractor pulling a box trailer crashed around 3 p.m. Tuesday and leaked nitric acid. The driver of the vehicle was killed, DPS said.

Those within half a mile of the incident were evacuated Tuesday by DPS and Tucson fire and police departments.

The University of Arizona Tech Park was among the facilities evacuated. Some schoolchildren in Rita Ranch were among those who sheltered in place, the Arizona Daily Star reported. Officials canceled classes at several nearby schools on Wednesday.

A shelter-in-place order was issued for a 1-mile perimeter after the wreck and lifted at 8:45 p.m. Tuesday. But DPS said gassing occurred when crews were working to remove the vehicle’s load, so the order was reinstated, initially at 1 mile, before 5 a.m. Wednesday.

People within the shelter-in-place perimeter had been advised to refrain from using heaters and/or air conditioners.

Nitric acid is used to make ammonium nitrate for fertilizers and in the manufacture of plastics and dyes.

Pima County’s health department and poison control center on Wednesday recommended that anyone who may have been in contact with the gas for more than 15 minutes get a medical evaluation if they develop respiratory difficulties like wheezing or shortness of breath. They said symptoms could be delayed up to 24 hours after exposure.

Health officials said it is possible that some people living within a mile of the accident may have been exposed to the material for more than 15 minutes if the building where they were sheltering in place was using an air conditioner or heater pulling in air from the outside. But they said that people who simply drove through or past the accident and chemical plume should not have been affected.

The Centers for Disease Control and Prevention’s website says nitric acid is a highly corrosive, colorless liquid with yellow or red fumes and can cause an acrid smell.

It says exposure to nitric acid can irritate the eyes, skin and mucous membranes. Depending on the dosage, it also can cause delayed pulmonary edema, pneumonitis, bronchitis and dental erosion.

The Associated Press contributed to this report.

Get the latest KTAR News 92.3 FM traffic alerts sent straight to your phone by texting “TRAFFIC” to 411923.

We want to hear from you.

Have a story idea or tip? Pass it along to the KTAR News team here.

Arizona News

The Simmons Fire can be seen burning near Kearny, Arizona, on May 28, 2024. The fire has destroyed ...

Arizona’s Simmons Fire destroys at least 2 structures after prompting evacuations

At least two structures were destroyed overnight by a wildfire that prompted evacuations near the central Arizona town of Kearny.

48 minutes ago

File photo of a Phoenix police crime scene. Police responding to a shooting in Ahwatukee on Tuesday...

Man killed, teen seriously injured in late-night shooting in Phoenix’s Ahwatukee area

A man was killed and a teenage boy was seriously wounded in a late-night shooting Tuesday in Phoenix’s Ahwatukee neighborhood.

1 hour ago

Auto thefts in Arizona fell from 2022 to 2023, new report found...

Auto thefts in Arizona fell 6% last year due to various factors, expert says

Auto thefts in Arizona fell last year by 6% compared to the year before, according to a new report from The National Insurance Crime Bureau.

2 hours ago


Nick Borgia

City of Avondale announces grand opening of sand volleyball complex

The City of Avondale announced the grand opening of a new sand volleyball complex. It is located at The BLVD.

4 hours ago

Park Algodon: $250M development breaks ground in Phoenix...

Construction starts on Park Algodon, a Phoenix industrial and mixed-use project

Developers broke ground on a $250 million industrial and mixed-use project called Park Algodon on May 22, 2024, officials said.

4 hours ago

Clothes, shoes, toys for Arizona boys in foster care needed, Foster Alliance in Phoenix says...

Serena O'Sullivan

Foster Alliance needs clothes, shoes and toys for Arizona boys

Foster Alliance, Arizona's top provider of essential needs for kids in foster care, is urging Valley residents to donate kids' clothes.

4 hours ago

Sponsored Articles


Sanderson Ford

3 new rides for 3 new road trips in Arizona

It's time for the Sanderson Ford Memorial Day sale with the Mighty Fine 69 Anniversary, as Sanderson Ford turned 69 years old in May.


Collins Comfort Masters

Here’s how to be worry-free when your A/C goes out in the middle of summer

PHOENIX -- As Arizona approaches another hot summer, Phoenix residents are likely to spend more time indoors.



Here are 5 things Arizona residents need to know about their HVAC system

It's warming back up in the Valley, which means it's time to think about your air conditioning system's preparedness for summer.

Interstate 10 in Tucson reopens following fatal crash, toxic spill