If there is a downed tree in your neighborhood park or trail, Montgomery Parks has a form that you can fill out.
Residents can also call 301-670-8080. Emergencies in parks can be reported to Park Police at 301-495-2595.
Update, Oct. 30: Fallen Trees
611 Boston Avenue
1110 Holton Lane
7304 Glenside Dr. (tree crew is on scene removing the tree from across Glenside Dr.)
There is a wire down at this location also and PEPCO has been contacted.