This driveway in Don Mills, Ont., outfitted with the PG45 Paving Grid, supports the weight of a car while also sucking up excess water. (Green Innovations)

Right now is a white-knuckle time to be a homeowner. Not because of bubble worries in the condo market or fears of an interest-rate spike. Over the past few years, global warming has become undeniably more menacing. It has caused an increase in roof-wrecking, basement-flooding storms and the type of sweltering, seemingly endless heat wave that makes homes feel more like giant saunas.

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