Vox
July 17, 2026
How Climate Change Is Making Wildfire Smoke a Recurring Crisis for US Cities
TL;DR
Wildfires burning across Canada and Minnesota are choking major US cities with smoke, a problem that climate change is making longer, more intense, and increasingly common.
Key Takeaways
- 1Rising global temperatures extend wildfire seasons and increase fire intensity by drying out wood and making it more flammable
- 2Climate change may also increase lightning strikes, which are the primary igniter of wildfires in Canada
- 3Annual burnt area in Canada could nearly double by the end of the century due to climate impacts
- 4Weather patterns are currently pushing wildfire smoke eastward, affecting air quality in major US cities including New York, Detroit, Chicago, and Washington DC
- 5Poor air quality from smoke makes outdoor exercise hazardous and represents a new normal for affected regions
Notable Quotes
“climate change is likely to make this problem worse and more common”
— Fire scientist at Canada's Forest Service
“Welcome to our new normal.”
— Narrator
Chapters
1. Current Air Quality Crisis
Four of the world's worst air quality cities are currently in the US, with smoke from 100+ wildfires in Canada and Minnesota being driven eastward to the coast.
2. Climate Change as the Root Cause
While some blame Canada for not preventing fires, climate change is the underlying culprit, making wildfires more frequent and severe.
3. How Climate Change Intensifies Wildfires
Rising temperatures dry out wood, making it more combustible, and may increase lightning strikes—the primary fire igniter—creating worse fire conditions.
4. Future Projections and Health Impact
Canada's burnt area could double by century's end, and people are advised to avoid outdoor exercise due to poor air quality, marking a shift to a new normal.
Key People & Entities
- Canada's Forest Service
- Government agency that studies wildfires and climate impacts on fire behavior
Glossary
- Wildfire season
- The period of time each year when conditions are favorable for wildfires to start and spread, typically becoming longer due to climate change
- Burnt area
- The total geographic area consumed or damaged by wildfires in a given region or time period