Weather Networks are forecasting sunshine and temperatures climbing into the low 30s, with humidex values making it feel even hotter. That kind of heat can be more than just uncomfortable, it can pose health risks, especially for seniors, young children and anyone working outdoors.To find out what's driving this stretch of hot weather, how long it's expected to last, and whether this is shaping up to be one of the hottest weeks of the summer, Andrew Carter spoke with Mark Sirois, better known as The Weather Whisperer™.