Air quality levels in Chicago, Detroitt and New York reached dangerously high levels on Tuesday as the US cities were shrouded in smoke produced by wildfires raging through swathes of Canadian forestland. More than 130 fires are still active in northwestern Ontario province, with at least 60 out of control according to Canadian data.
The Manhattan skyline was obscured by thick haze and Chicago closed its beaches Thursday as out-of-control Canadian wildfires raged, sending smoke spewing into the United States and exposing millions of people to dangerously unhealthy air.
