IQAir, a company which tracks global air quality, ranked Toronto, New York and Washington DC as the cities with the worst air quality in the world on Saturday due to the ongoing smokey haze hanging over.

The Akawa Butte and Brewer fires are growing significantly; Deschutes and Jefferson County sheriff’s offices have Level 1, 2and 3 evacuation notices in place.

Governor Tina Kotek invoked the Emergency Conflagration Act for the Rowe Creek Complex fires on Friday.

Half of Canada’s wildfires are in remote areas with no road access. Impossible to fight, they are often left to burn.

Several wildfires sparked this week as lightning strikes lit up Washington and a Red Flag Warning was in place. There are now at least a dozen fires burning across the state that have scorched more than 14,

State resources are en route to help local firefighters.

Smoky skies in Toronto have led to new scrutiny of government efforts to fight fires and manage forests. But scientists say the realistic way to tackle the smoke is fighting climate change itself.

There are dozens of fires burning across Oregon. Here's the latest on each major fire.

Hundreds of Canadian wildfires remain active, with smoke expected to linger over New Jersey before conditions improve.