The rail broke in the Wolverhampton area, blocking the line towards Birmingham New Street.
Train operators, including West Midlands Railway and London Northwestern Railway, warned that trains running between the two cities may be cancelled or diverted via Bescot Stadium.
West Midlands Railway warned passengers: "Some stations between Wolverhampton and Birmingham New Street will not be served by train. Disruption is expected to last until around 09:00 today (13 May)."
However, the disruption warning was later extended until midday and then again until 6pm with passengers told trains could be delayed by 15 minutes, diverted via Bescot Stadium or cancelled.
Services affected include:
Avanti West Coast between Edinburgh / Blackpool North / and Birmingham New Street, and between Edinburgh / Lancaster / Blackpool North / Manchester Piccadilly / Shrewsbury / Wolverhampton and London Euston
CrossCountry between Manchester Piccadilly and Birmingham New Street / Reading / Southampton Central / Bournemouth
London Northwestern Railway between Liverpool Lime Street / Crewe and Birmingham New Street, and between Crewe and Walsall, and between Wolverhampton and London Euston
Transport for Wales between Aberystwyth / Chester and Birmingham New Street, and between Holyhead / Aberystwyth / Chester / Crewe and Birmingham International
West Midlands Railway between Walsall and Wolverhampton, and between Shrewsbury / Wolverhampton and Birmingham New Street
Passengers were also being advised to check before travelling, and to keep their tickets for any compensation claims.