10/22/2013 12:35 EDT | Updated 12/22/2013 05:12 EST

Derailed propane cars still burning west of Edmonton

CN continues to burn off propane from a ruptured tanker car, more than three days after a train carrying oil and propane derailed west of Edmonton.

Firefighters are flooding the car with water in the hope the propane will rise to the top of the car and burn off more quickly.

Shortly after 5 p.m. Monday, CN tried for the second time to use explosives to puncture the derailed cars to help burn off the propane, but shortly after 7 p.m., it found one tank car still contained almost 57,000 litres of propane. 

CN intended to start a third control burn, but when officials discovered the propane tank car was flaring just before 9 p.m., officials decided to pump water into the tank to hasten the burn-off.

Fire crews began pouring water into the tank before 7 a.m. Tuesday.

CN said it will not predict when 126 residents can move back into their homes near the derailment site near Gainford, 80 kilometres west of Edmonton.

CN has said the 134-car train was travelling to Vancouver from Edmonton at a normal speed of 35 km/h when 13 cars left the tracks.

The Yellowhead Highway — the main east-west corridor in northern Alberta, connecting Edmonton with Jasper — remained closed at scene Tuesday.