GREENWICH - Yesterday's severe weather caused a fire in Greenwich when a lightning strike ignited a power line.The live power line went down and caught fire on Old Mill Road. Firefighters from three departments closed down the street to put out the fire while utility crews from Connecticut Light and Power cut off power to the area. At one point, close to 500 people in Greenwich lost power. CL&P says they are now down to less than 70, and its crews are working on sporadic outages throughout the area.Officials say no one was hurt, and the last few dozen people left in the dark today should be back on line by tonight.