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The electrical fire at the New Canaan Avenue power substation in Norwalk began just after 7:30 p.m. Monday, Aug. 24.
Upon firefighters' arrival, heavy flames were visible from an elevated switch gear cabinet that controls a 13,800-volt transmission line, the Norwalk Fire Department said.
Eversource technicians were on scene immediately to start the process of shutting down the adjacent gear switches, so the firefighters could safely operate and extinguish the fire, according to the fire department.
Firefighters initially used dry chemical extinguishers to knock down the fire, then a CO2 extinguisher to cool the equipment.
Once the fire was extinguished, Eversource employees then started to restore the power, that was shut down for firefighting.
Two engines, a truck and command car responded to the scene.
By 11 p.m. Monday, the number of outages in Norwalk was around 2,000.
Firefighters cleared the scene by 8:30 p.m.
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