One service between Edinburgh and Glasgow has already been cancelled.
In a post on Twitter, ScotRail wrote: “NEW: Due to an incident involving the emergency services, train services between Glasgow Central and Edinburgh via Shotts may be cancelled, delayed or revised.
“Ticket acceptance: 2L Dalmuir to Larkhall services to divert via Carmyle and terminate at Motherwell. 2R Dalmuir to Motherwell services to divert via Carmyle. 2C Dalmuir to Motherwell / Cumbernauld services to divert via Carmyle.”