If you have an overhead phone line and you are in one of the areas with excess snow, might want to just take a peek at it. Mine had got to about 5" diameter. Same thing happened a couple weeks ago, and someone else's line pulled the fixing bracket out of their wall, bringing their line down across my garden. (Still not repaired.)
A light tap with a plastic pole from the bedroom window and most of the snow fell off, and the shock caused it to fall off someone else's line from the pole too. Make sure you aren't doing this to a mains supply, and use a plastic pole just in case you're wrong!
No liability accepted if you break your line, etc...