Power has been restored in Wellington allowing Auckland trains to resume services.
CEO Jim Quinn has apologised for the outage at KiwiRail's national train control centre in Wellington, affecting all signals and radio communications on the Auckland network.
He says the systems are all back up and running now and the power in Wellington's centre is back on.
However he says the delays have caused major backlog and they're working to clear that now.
The power outage in the central hub affected signal and radio control in Auckland, while transport in the capital was unaffected.
Buses and taxis have been organised while the issue was being resolved.
Veolia Transport is urging customers to look for alternative transport and it's organising as many rail buses and taxis as it can.
Rail tickets may be used on buses run by New Zealand Bus, Howick and Eastern, Urban Express and Ritchies.
KiwiRail acknowledges its power outage affecting all Auckland train services has come at a critical time of day.
Photo: NZ Herald