Millions of people in the Great Lakes, Northeast and Mid-Atlantic states are muddling through another day of hazy, unhealthy air as smoke from wildfires in Minnesota and Canada push south and east. The nation’s capital was enveloped in an eerie haze Friday. Air quality warnings were expected to remain in effect at least through Saturday across a chunk of the U.S. There’s potential for temporary relief with storms forecast over the weekend. How long the reprieve lasts depends on what happens in Canada and Minnesota. There is also concern about how the air quality might impact the World Cup final in New Jersey on Sunday.