Canada threatening to cut off power to U.S.

So I live in Wisconsin. I know Trump is planning to sign the tariff’s for Mexico and Canada. I’m panicking because if Canada cuts off the power I am not prepared. Does anyone have any advice on things to purchase in case it does happen? I’m thinking of going to walmart and buying emergency blankets, duct tape, plastic wrapping for the windows to keep the cold out. I have a good amount of water and canned food. Is there anything that I may be missing that could be essential? How likely do you think it is that Canada goes through with shutting off our power?