Millions in Canada swelter as heatwave continues to move east

Another record-breaking heatwave has hit parts of Canada and the US, bringing extreme temperatures and poor air quality. Extreme heat warnings have been in place across multiple Canadian provinces, including most of Ontario and part of Quebec, Manitoba and the Northwest Territories - affecting millions of people. The high temperatures are expected to continue for Canada, as well as for parts of the US Midwest and Northeast, into Wednesday as the strong area of high pressure moves eastwards. It has already led to all-time temperature records being broken in parts of Montana and Utah, and comes after a record-breaking heatwave hit large portions of the US earlier this month. The Canadian city of Toronto was braced for possible record-breaking heat on Tuesday, but stopped short at 98F (36C). Commuter trains were running on delays due to "weather related track conditions", according to the regional public transit service, while Environment Canada warned that hot and humid air could result in deteriorating air quality. Central and eastern areas of Canada have also been hot, but a cold front is set to bring lower temperatures over the next few days. It will also bring the threat of sever