The elderly victim had been recently displaced from his home during the Montecito mudslides, police said.
The suspect was identified as Nicholas B. Hart, 26, of Goleta.
Police say Hart had a blood-alcohol content approximately three times the legal limit and was also under the influence of prescription drugs. He was in possession of an open bottle of alcohol and marijuana at the time of the crash, police said.
The incident happened Tuesday at 7:34 p.m. Investigators say the victim was crossing in a marked crosswalk at State and Micheltorena streets when a car came flying down the road at a high rate of speed and struck him.
The victim was transported to a hospital in critical condition with life-threatening injuries.
Third-Time DUI Suspect Critically Injures 91 yr-old Man In Crosswalk— Santa Barbara PD PIO (@SBPDPIO) January 24, 2018
Driver had suspended license.
Release and Video Statement from Chief of Police Lori Luhnow: https://t.co/PXxf1X6Jr2
Hart Picture Attached pic.twitter.com/5ucaR4migQ
Police say Hart was driving a 2003 Honda Civic with a license that had been suspended because of two prior DUI convictions in the last three years.
He is being held on $1 million bail at the Santa Barbara County Jail. He is facing charges of felony DUI drugs with injury; felony DUI alcohol with injury and driving on a suspended license for prior DUIs.
Santa Barbara Police Chief Lori Luhnow said the case reinforces the need for people to take steps to avoid drunk driving. She reminded those who intend to go out drinking to plan ahead to arrange a ride to avoid dangerous situations.
"This incident exhibits the worst-case scenario," Luhnow said. "Somebody who has been arrested before, didn't learn their lesson, is facing their third charge and critically injured somebody. So it's a tragedy for the victim's family as well as the subject that's facing charges at this point."