Billboards warning of the dangers of fentanyl use are going up across Sonoma County. The public service outreach campaign is a joint effort between the Sonoma County District Attorney’s Office, High Intensity Drug Trafficking Area Program, and the FDA. The agencies are trying to lower the number of deaths caused by the opioid. The D.A.’s Office says there have been 63 fentanyl-related deaths reported in Sonoma County this year. There were just four fentanyl-related deaths in the county in 2017, and 105 last year.