To report an electrical outage at your location call BGE 877.778.2222 -- BGE says you should not assume that it knows when your power is out.
Emergencies: 800.685.0123 -- If you smell natural gas, or see downed power lines, leave the area immediately and then call BGE.
These numbers are available 24 hours a day, 7 days a week.
For more, see BGE Outages & Storms