There are delays of up to 30 minutes on First Great Western services between Taunton and Bristol Temple Meads due to cows having been on the line at Nailsea and Backwell.
Lines are now open but delays are expected until around 9am.
More top news
Largely dry with some occasional sunshine this afternoon.
A 16-year-old schoolgirl, whose mum died of breast cancer, has raised £2,750 for the charity Hospiscare to thank them for their support.
Although the crime total has dropped by almost a third, high value farm equipment is still top of the thieves lists.