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.