At approximately 2 a.m. on July 20, the California Highway Patrol started receiving reports of a wrong-way driver in Rancho Cucamonga on the 210 Freeway. A 28-year-old man from La Habra was traveling west in the eastbound lanes of the freeway. As CHP units began positioning themselves to intervene, the man's vehicle collided with a silver Hyundai that contained four people according to a captain with CHP.
The 60-year-old driver of the Hyundai and his 56-year-old wife were seriously injured in the accident and transported to Loma Linda University Medical Center. The wife had been released as of July 21. The two passengers in the backseat of the Hyundai, a 38-year-old woman from Fontana and a 52-year-old woman visiting from London, were killed in the crash. Both women were related to the driver and his wife. The wrong-way driver also died in the wreck.