The National Grid phone number for reporting power outages is 1-800-322-3223. Should there be no answer there, the automated outage reporting system is the next option at 1-800-465-1212. Notifying National Grid is still necessary even if you have called local emergency personnel.
Remember, any wire on the ground may be live! Please do not attempt to move wires or tree material that is entangled with wires of any kind.