Trains travelling to and from London Paddington face delays, revisions or cancellations due to flooding.
First Great Western (FGW) says services may be delayed by up to 20 minutes or revised at short notice.
An estimate for the resumption of normal services will be provided as soon as the problem has been fully assessed.
An update is expected to follow within the next six hours on the FGW website and twitter page.
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The victim of an assault in Cippenham was flown to hospital by air ambulance this afternoon.
A rapid response vehicle, an ambulance officer, an air ambulance and an ambulance crew were all called to an address in Earls Lane at 2.10pm.