Flood alerts are in force for two stretches of river near Preston.
Much of the Garstang area running down towards Woodplumpton is covered by a flood alert by the Environment Agency on the lower and upper river Wyre at Brock.
A swathe of the Ribble Valley and Forest of Bowland is also covered by a flood alert, the lowest level warning, covering the upper River Ribble at Hodder.
Read more: Questions over flood protections for Ribble Valley communities as Autumn rain arrives
Rising river levels are being watched carefully and heavy rain is expected to fall in the following days leading to the flood risk.