TURNER VALLEY, Alta. – An Alberta Emergency Alert system says a sour gas pipeline has ruptured in Turner Valley southwest of Calgary.
The alert urges people to move indoors and to prepare for a possible evacuation.
It says the rupture is potentially life-threatening.
Sour gas is natural gas with a high sulphur content and is extremely toxic even in small concentrations.
The Turner Valley area is currently experiencing significant flooding due to heavy rains.
Two neighbourhoods are already under a mandatory evacuation order.