Rig involved in fatal crash assisting Nuns Fire registered to Red Bluff company

A private contractor on the front lines of the Nuns Fire was killed Monday morning when his truck plunged off a steep roadway. The accident is under investigation and the driver's identity has still not been released.Courtesy:?Laura Anthony/KGO-TV.

RED BLUFF, Calif. - According to CAL FIRE, the driver involved in the fatal crash in Napa County Monday morning was reported to be driving for a Red Bluff based company.

The rig involved in this morning's accident is registered to a small company, Tehama Transport in Red Bluff. The driver's identity has not been released pending notification of his family.

"Our hearts go out to the family and friends impacted by this," said CAL FIRE's Chris Anthony. "It impacts all of us."

All of the water tender drivers who contract with CAL FIRE must complete an annual safety course in wildland fire attack, as well as have the proper radios and equipment to work in sync with CAL FIRE and municipal fire crews.

The driver was driving into Napa Valley's Robert Mondavi Winery to help battle blazes when he apparently lost control of the car, a California fire official confirmed to ABC News.

This morning, a private water tender driver assigned to the #NunsFire tragically died in a vehicle rollover on Oakville Grade in Napa Co.

-- CAL FIRE PIO (@CALFIRE_PIO) October 16, 2017

KGO contributed to this report.