In case of water damage, don't panic! First of all, to limit the damage, we recommend that you try to detect the source of the leak (if possible), otherwise immediately cut off the water supply to your home.
If the water level is high (we hope not), also cut off the electricity to avoid a remake of Claude Francois in his bathtub. If it is still possible, move your belongings to keep them as dry as possible.
And of course: inform your insurance company! At Lovys, nothing could be simpler, just declare your claim online ?