There are several previous threads on this subject. This is the most recent: https://www.reddit.com/r/washingtondc/comments/wqojib/emergency_mental_health_services/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button

(Figured this was faster in an emergency than waiting for people to reply, especially as many may be asleep).

Good luck!