North Wales Police are appealing to anyone who has left a flooded property in the Garford Road area of Rhyl to stay with relatives or friends to contact them immediately.
Emergency service are about to begin a search of affected properties in the area in an effort to account for all residents.
The number to call is 01492 518383.
More top news
Occasional blustery showers overnight and brisk north-westerly winds. Patchy rain will continue during the day tomorrow.
Dame Shirley Bassey releases her first festive recording "The Christmas Song" with Brit-Award winning harmonisers Blake.
Private Gavin Williams was initially treated for a psychiatric episode rather than heatstroke an inquest hears.