More than 2.9m acres (1.1m hectares) have burned across Washington and Oregon this year, as fast-moving wildfires consume communities, darken the region with toxic smoke and push firefighting resources toward their limits.
At least 846 structures were destroyed by three fires on the eastern side of Washington, including in suburbs around Spokane. Oregon has already recorded more burned acreage this year than in any previous year in its records, while Washington is experiencing its most destructive fire season.
What is driving the fires
An exceptionally hot, dry July left vegetation across Washington and Oregon ready to burn. Some areas received only half or a quarter of their typical July rainfall, according to a National Interagency Fire Center outlook.
More than 600 fires began during a 10-day period in July after lightning storms, with strong winds helping some spread through areas that would normally still have snow. The Old Trails fire, one of at least three fires that converged around Spokane, may have been deliberately started; a man has been taken into custody.
Related coverage: Devastating Wildfires Rage Across France and Spain as Heatwaves Persist.
The danger is expected to continue
The National Interagency Fire Center expects significant fire potential to remain elevated through September, while below-normal precipitation is forecast across the parched landscapes into November.
A very strong El Niño is also possible by September. Models put the chance at 95%, and the source says the pattern tends to bring hotter and drier winter conditions to Oregon and Washington, although El Niño’s effects vary around the world.
Fire crews are operating under severe pressure
On Friday, firefighters were battling 95 large fires across the United States. More than 6.3m acres have burned nationwide since the start of the year, and more than 45,800 fires have been recorded. A hundred new fires started in a single day last week.
The US reached preparedness level 5 on 18 July, the highest level, meaning firefighting resources were fully deployed. A federal fire captain described the level as requiring triage, while a retired fire chief with Grassroots Wildland Firefighters said the system would need double the workforce and probably triple the budget to suppress every fire before it grew large.
Why smoke and fire risks extend beyond eastern Washington
Most of the current activity has been in eastern Washington, where conditions are hotter and drier than in the state’s coastal areas. But fire ecologist Susan Prichard warned that western Washington and western Oregon are also capable of burning, pointing to the 2020 Labor Day fires that scorched more than 1m acres, destroyed thousands of homes and killed 11 people.
The wider pattern is also visible in Europe, where more than 1.3m acres have burned this year. A study cited by the source found that human-caused climate change made the fires in south-western France twice as likely and those in central Spain 20 times more likely.
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