No trains to and from King's Lynn
Great Northern have advised train passengers not to travel to and from King's Lynn this evening.
A tweet from the train operator said: "Due to damage to the overhead wires between King's Lynn and Ely we are unable to run between these stations. A reduced service is in place between Cambridge and Ely.
"If you require any stations on this line we strongly advise to not travel."
Worried travellers were tweeting GN to ask whether the service would be up and running again by the morning but the only advice given was to check before you leave.
The record heat today with the mercury reaching 38C in Cambridge has caused problems for the rail network nationwide.
Many services were cancelled as train operators and Network Rail warned the system could not cope with the searing heat.
Severe speed restrictions have been imposed due to concern that track temperatures could reach nearly 60C (140F) and buckle, putting trains at risk of derailing.