Loading…. New York’s air quality remains in the ‘very unhealthy’ category, as more smoke pours in from Canada’s devastating wildfires. The city continues to have the worst air quality in the world currently according to the Air Quality Index. At one stage, it was more than 56 times over the World Health Organisation’s air pollution limit. A heat-health warning has been issued for parts of England over the weekend as temperatures are expected to surge. A yellow alert is in place from 9am on Friday until the same time on Monday, for London, East Midlands, West Midlands, East of England,…