Mr. Feldman, 59, was in Havasu for the Western Pyrotechnics Association's aerial-fireworks event, according to the News-Herald in Lake Havasu.
The incident happened when Mr. Feldman, a longtime member of the association, was driving on State Route 95 in Havasu. Fireworks' casings were strewn along the road, and the driver stopped and got out of the car to investigate, according to the News-Herald.
"That's when the back (of the car) blew up," said Battalion Chief Mike Quijada of Lake Havasu City Fire Department.
Mr. Feldman was evacuated by air to Las Vegas, where he died Feb. 27 in Sunrise Hospital, surrounded by his family.
The family said he was a man of many talents who could fix anything, would help anyone and talk to everyone.
He was married to Linda Feldman for 28 years; father to Jessica Lynn and Alison Michelle; son to Bernard and Ellen Feldman and Marian Hammer; brother to Michael, Daniel, Adam and Marshall; and uncle to many nieces and nephews.
The family prefers memorial donations in his name to: The Firefighters of Southern Nevada Burn Foundation, 3111 S. Valley View Blvd., Suite B -111, Las Vegas, NV 89102; The Lion's Burn Care Center at University Medical Center, 1800 W. Charleston Blvd., Las Vegas, NV 89102; or to a charity of the donor's choice.