Explaining the depth of Calgary's water crisis The Big Story

Typically, a broken water main does not plunge a city into weeks of critical water shortages and a state of emergency. But the pipe that broke on June 5 wasn't a typical water main. Now, almost two weeks later, the city is estimating another three to five weeks for full repairs, and until then Calgarians are under water restrictions.

How did the break happen, and could it have been prevented? Why will repairs take so long? What might happen if the city gets close to running out of water? And will the Calgary Stampede, due to start on July 5th, still go on as scheduled?

GUEST: Kerry Black, Assistant Professor and Canada Research Chair, Department of Civil Engineering, University of Calgary