Trains from Bedford and Flitwick to London will not be running until at least Monday lunchtime following overnight storm damage.
A spokeswoman for First Capital Connect said there would not be a normal service today and no trains running to St Pancras until lunchtime.
Network Rail engineers are working to clear a number of problems on the tracks including a tree at St Albans and overhead wire issues between Radlett and Mill Hill.
She said: “As soon at Network Rail tell us that the lines are safe we can begin running services.”
London Midland is running a normal service on the Bedford to Bletchley line.