Really cold weather may be behind us. If temps drop below 20 degrees at night and the power goes out you could have frozen pipes.
All houses are different. If you keep your heat on pipes will probably not freeze. If pipes are on an outside wall chances of them freezing is pretty good. The best thing to do is to make sure pipes are insulated or they have heat tape attached to them. The other option is to let faucets drip to keep water flowing. Hot water will freeze before cold water.
If pipes do freeze. Call a plumber to have them thaw them out properly. Pipes may burst under pressure. Open up faucets to relieve the pressure.
When the weather warms up contact your local plumber and have them inspect the piping of the home and see where the problem pipes are.
Ace hi Plumbing,Heating and Air offers free insulation with any repipe of a home.