Around the hospitals north of Hampden the lights never really go out, and neither do the sidewalks — people are walking them at every hour, snow or not. Sentry Property Service handles snow removal for properties like that: plowing lots and lanes, clearing walks and entryways, putting ice melt where foot traffic and shade meet. Englewood's freeze-thaw is the quiet hazard, meltwater crossing a walk at four in the afternoon and turning to glass by seven. The work runs on the storm's schedule rather than anyone's preference. A clear path to the door at midnight is worth about as much as anything you can do for a building.