The rise of synthetic drugs in D.C.—specifically synthetic cannabinoids known on the street as K2, Spice, Scooby Snax, and more—has been drastic this summer. Since April, there have been 906 reported cases of synthetic cannabinoid overdoses, with 439 of those cases reported in just June alone.

A lot of these overdoses are taking place in and around homeless shelters and places where homeless residents tend to congregate. To help combat the problem, the U.S. Attorney’s Office for the District of Columbia will sponsor three presentations at homeless shelters across the city focusing on the dangers of synthetic cannabinoids.

“Despite innocent-sounding names like Spice and Scooby Snax, synthetic cannabinoids threaten public health and safety,” Acting U.S. Attorney Cohen said in a statement. “While we are committed to enforcing criminal laws, we also have a responsibility to educate the public. As evidenced by recent overdoses of homeless individuals, we need to reach out to all segments of our community to get the message out that synthetic cannabinoids are far from harmless.”

The first presentation will take place tonight at 6:30 p.m. at the D.C. General homeless shelter (1900 Massachusetts Avenue SE). The next one will be on Tuesday, August 11 at 6 p.m. at the men’s shelter at the Central Union Mission (65 Massachusetts Avenue NW). The final presentation will be on Wednesday, August 19 at 7 p.m. at the Community for Creative Non-Violence shelter (425 Mitch Snyder Place NW).

All of the presentations are free for residents and shelter guests.