Their two boys were already tucked in, and Amy and John Kelly were watching the storm news on TV in their Quincy home at 10 p.m. Friday when everything went dark. OK, they figured, good time to turn in.

Amy Kelly had heeded the warnings and jacked up the thermostat earlier in the evening. “My husband said, ‘Why is it so hot in here?’ I didn’t want to tell him because he would think I was crazy,” Kelly said, with a laugh.