There are currently delays of up to an hour on East Midland Trains between Norwich and Peterborough.
There's also disruption on Greater Anglia between Norwich and Colchester and the service has been suspended between Colchester and Clacton-on-Sea, and between Colchester and Walton-on-the-Naze.
Work will go on overnight to repair the damage and if you are planning to travel tomorrow you are advised to check before setting out.
More top news
Today's showers will ease this evening and it will be a fine start to the weekend. However, further showers will develop later Saturday
Suffolk boxer Anthony Ogogo says he wants to make up for lost time in his pursuit of a world title.
Many places will stay cloudy this afternoon, although there will be a few bright spells around. Scattered showers will develop in places.