Fire crews are helping pump seawater onto the cliff at Dawlish to bring down 350,000 thousand tonnes of potentially unstable rock and earth. Network Rail says the operation should prevent a potentially "catastrophic" collapse that poses a risk to workers.
The recent storms caused more than thirty landslips along the coast.
Network Rail is under pressure to finish the Dawlish repairs by the target date of 4 April 2014. The video above shows the fire crews' work in progress.
As work takes place to repair the storm-damaged railway at Dawlish, residents are calling for a wider sea wall to protect their homes
Network Rail says the track connecting Cornwall and much of Devon with the rest of the UK will be ready from 17th April, if not sooner