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An aerial view of structures destroyed by wildfire and others spared by fire retardant in Talent, Oregon. Photo: David Ryder/Getty Images

Portland, Oregon, recorded the poorest air quality in the world Tuesday, per IQ Air, as the West Coast wildfires burn across some 5 million acres.

Why it matters: The mega-fires have charred 3,154,107 acres in California, over 1 million in Oregon and more than 807,000 in Washington amid hazardous air conditions. Seattle has the world's third-worst air quality and Los Angeles the seventh, according to IQ Air. The blazes have killed at least 35 people and displaced tens of thousands. Thousands of structures have been destroyed.

Go deeper: In photos: Historic wildfires rage across the West

Editor's note: This article has been updated with more details on the fires and air quality.

Go deeper

Air travel's COVID-created future

Illustration: Aïda Amer/Axios. Photo: Ann Ronan Pictures, Bettmann/Getty Images

A look at the future of air travel as we head into the Thanksgiving holiday week while coronavirus cases are surging and the CDC is urging Americans to avoid travel.

The manufacturing boom's bottleneck

llustration: Rebecca Zisser/Axios

The manufacturing sector has bounced back from its pandemic knockout. But as the economy reopens, factories can't keep up with orders.

Why it matters: The materials manufacturers need are hard to find and prices for them are soaring.

2 hours ago - Technology

Twitter to label COVID-19 vaccine misinformation, implement strike policy

Photo: Illustration by Igor Golovniov/SOPA Images/LightRocket via Getty Images

Twitter announced Monday that it will label tweets with potentially misleading information about COVID-19 vaccines, and introduce a strike system that can lead to permanent account suspension.

The big picture: Tech companies are taking an increasingly aggressive stance against users who attempt to share misleading information about COVID-19 vaccines on their platforms.