Revere firefighters list one, possibly as many as three people missing Friday as of 7:30 a.m. in 79 Reservoir Ave. where the city’s fire chief said the narrow, snow-bound hilltop street made fighting the fire tough.Fire Chief Eugene Doherty said Deputy Fire Chief Christopher Bright struck a second alarm after firefighters converged on the two-story home at 5:45 a.m. Bright’s uncles, Robert and Dennis, live in the house and Bright managed to find and rescue Robert Twoomey, but Dennis Twoomey’s whereabouts were unknown. Thor Jourgensen, Item reporter, will update this story.