[HIGHLIGHTS] New York and Washington in the smoke: warning levels for 100 million people in the USA

Smoke from wildfires in Canada is moving across the United States. New York in particular has been severely affected, with a red alert.

More than 100 million people in the U.S. are affected by increased air quality health alert levels. The forest fires, which have been raging in Canada for weeks, are considered the main cause. Winds carry the smoke particles to the southern neighbor USA. In Canada's metropolises of Ottawa and Toronto, as well as in the US states of Minnesota and Massachusetts, authorities also warned residents.