As the already chilly temperatures plummet into frigid numbers tonight, D.C. officially declare cold emergency.

According to a release from Mayor Muriel Bowser’s office, the District will activate a cold emergency plan at 9 p.m. tonight, with means the city will implement “additional measures beyond traditional sheltering, such as warming sites,” to keep homeless residents safe and warm.

“Tonight and tomorrow we are expecting temperatures to drop to as low as the mid-teens. Temperatures that cold can be dangerous for many of our friends and neighbors, including seniors, the homeless and less fortunate residents who may lack adequate heating or clothing,” Bowser said in a statement. “The District has the resources to keep our residents safe and secure. Activating our Cold Emergency Plan allows the city government to deliver vital services to residents when and where they need it most.”

If you see someone on the streets tonight, you can help them find shelter by calling the Shelter Hotline at 202-399-7093, 211 or 311, or toll free from a payphone at 1-800-535-7252.