The St. Louis County health department released on Wednesday a report on heroin, the St. Louis region’s deadliest illegal drug.

The report highlights the rise from 88 deaths involving heroin in 2013 to 110 deaths in 2014. There were 99 heroin deaths through the third week of December 2015, according to the county medical examiner. That number could rise as autopsies are completed.

“The data is alarming,” County Executive Steve Stenger said in a statement. “There is a clear upward trend, which is why now is the time to act to reverse these numbers, and we are doing just that.”

Stenger said there might be early signs of a turnaround in heroin deaths, which totaled 11 in 2001.

“I think we’re going to show some type of a decrease in 2015. What that is due to, I can’t exactly say,” Stenger said. “It could be that the decrease was from some of our efforts we undertook in 2015 to raise awareness of the issue.”