During last week's February thaw, I decided to go out clearing some storm drains to let the puddles drain before things froze up again. There were a couple on Florence that weren't draining, though, like this one:
The result was a puddle on the sidewalk, which didn't make for good walking conditions, now or when it freezes into solid ice.
There's another one that's so bad you can't even see it under the puddle. The grate is behind that car that's sticking out:
When the water doesn't drain, it can freeze into ice when the mercury drops. This is a hazard for pedestrians and vehicles, but it also seeps into the pavement and expands, creating potholes. That's why it's best to clear the snow and slush away from the drain when it's warm.