It's possible that you have an open neutral. That can be a dangerous condition. The problem could be on the utility's side of the meter, or on your side. Let the power company take a look and say what they think. If they don't find the problem, then it is best to call an electrician ASAP to look at things.
In the meantime, it would be a good idea to at least shut off 120V appliances, like the refrigerator, to prevent damage. Shut off everything, if you can.
In the meantime, it would be a good idea to at least shut off 120V appliances, like the refrigerator, to prevent damage. Shut off everything, if you can.