1st Find what the water source loss is , if at all possible turn water off.
2nd Take photo's and document areas affected
3rd Get shop vacuum and suck up as much water as you can
4th Get a plumber out to make repair/clear drain back up
5th Call your insurance company to file a claim, know your coverage details. Sometimes customers find out they do not have sump pump or drain back-up coverage when they need it and end up having to pay for all the damages themselves.
6th Call Cemcare to assist you! We want to prevent further damages from occuring!