I would blow the lines out.. Weather is getting wilder (This is climate change) Winters can get colder, and more suddenly colder. Summers likewise Much hotter. Ok enough environmental talk.
Imagine the following: You put your electric heater in the garage to keep warm.
Hop in the 4-wheel ride and off to the airport. hop on a plane and go visit your darling daughter (ok so MY DD lives like a kilomile from me) and about the time you land a sudden and unexpected hard freeze hits your town. Temps in the ZERO range.. On top of that it shows and Mr. Idiot driving his big 4-wheeler thinks he can go like the wind on slick roads.. and so he can.. But what stopps the wind? When it hits somethign.. Like the Utility pole that supplies power to your house.. LIGHTS OUT.. Lines frozen.