A service is underway at St Asaph Cathedral in memory of 91-year-old Margaret Hughes, who died during last week's floods.
The Dean of St Asaph said prayers and reflections will take place in the theme of 'Light in our Darkness'.
The service is also intended to provide hope and comfort to residents, many of whom face being homeless for Christmas.
More top news
Showers overnight will make way for heavy rain tomorrow! The Met Office has issued a warning to be aware!
Dermatology services in west Wales are at breaking point say top skin experts in Wales. Hywel Dda currently has no consultant dermatologist.
Sara Garbutt of Rhyl robbed a vulnerable pensioner and stood by while he was beaten up. She's now been jailed for eight years.