The Liberals say their changes to the capital gains tax mean that Canada's ultra rich will pay a little more, money they can easily afford. The Conservatives say the Liberals are taxing small business owners and Canadians already struggling to get by. Who's right? What if they both are?

The changes to the tax were bound to become a political football: A complicated tweak to an existing tax that can be easily spun by either side of the aisle. So who will it really hurt? Will it help? What do you need to understand before you panic sell the family cottage?

GUEST: Laura Dhillon Kane, Ottawa bureau chief, Bloomberg News

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A few weeks ago, temperatures in India blasted past 50 degrees Celsius. Currently much of the United States and parts of Canada are in the grip of a heat dome that could shatter records. Summer's hot, and heat waves happen. We know this. But if a heat wave is a period of time with temperatures above normal, and the "normal" temperature keeps rising...

What do the heat waves of the future mean for us? What exactly is a "wet bulb" measurement? Which parts of the world can withstand the heat to come, and how can we prepare the ones that can't?

GUEST: Dr. Kent Moore, professor of atmospheric physics, University of Toronto

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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

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