According to Gas Buddy, gas prices could rise 20-40 cents per gallon, and those increases could come quickly.
There could also be increases in the cost of diesel fuel, propane, jet fuel and kerosene.
New tariffs imposed by President Donald Trump could mean that drivers in New Hampshire will pay more at the gas pump.
Energy imports from Canada will have a 10% tax added to them, and most of the gas in New Hampshire comes from the Irving refinery in New Brunswick.