The 2019 HARD Summer Music Festival drew more than 170,000 fans to Auto Club Speedway in Fontana during the weekend of Aug. 3 and 4.
It was the most popular event in Fontana's history and attracted fans from all over the country.
During the two-day event, 15 people were taken to local hospitals for conditions related to heat exposure, dehydration, injuries and alcohol and drug consumption, according to the San Bernardino County Sheriff's Department.
Deputies made 11 arrests for public intoxication, drug possession, battery and theft.
The event provided free parking within Auto Club Speedway. However, many attendees parked vehicles in the area surrounding the venue and reported damage and thefts from their vehicles, the Sheriff's Department said.
The annual festival, which was being held in Fontana for the third time, featured many of the top acts in electronic dance music (EDM) and hip hop. It was coordinated by Insomniac.
Last year's festival attracted 155,500 attendees.