Pickett Fire threatens wineries in Napa Valley, California

The Pickett Fire has burned through 2 642 ha (6 531 acres) of land since it ignited on August 21. First reported at approximately 14:57 local time (LT) on August 21, the blaze has spread across the rugged hills north of Calistoga, Napa County, California, and is at 11 % containment as of August 24.

Cal Fire deployed over 1 230 personnel, 80 engines, and 23 water tenders to the area, supported by aerial resources including night-flying helicopters and drones.

Ground crews carried out aggressive direct attacks, using mitigation zones established after the 2020 Glass Fire. The cause of the fire remains under investigation.

Evacuation orders were issued for approximately 190 residents near Pope Valley, while an additional 360 people were placed under evacuation warnings.

Several roads remain partially closed, and air quality advisories are in effect across Napa, Solano, and Sonoma counties due to smoke dispersion. Napa County has activated emergency response centers to support evacuation efforts and provide health services.

The fire is also threatening prominent wineries in the region, including Hundred Acre, Venge, Canard, and Hourglass. As of August 23, no structural damage had been confirmed, but operations at many facilities have been suspended due to the fire’s proximity.

Grape harvests have been paused or delayed, though crews at Venge Vineyard continued early harvesting of Sauvignon Blanc. Smoke taint, a known issue in wildfire-affected wine regions, has not been detected at spoilage-warning levels.

The wildfire comes as California is experiencing its worst multi-day heatwave of the year, with some cities already breaking daily temperature records.

Fire risks remain exceptionally high across the U.S. West Coast, with high temperatures expected to linger for days.

“Hot, dry, and unstable conditions are likely along much of the West Coast near and west of the Cascades and Sierra as near record-setting temperatures -12 to -4 °C (10-25 °F) above normal are expected,” according to an analysis from the National Interagency Fire Center issued on August 22.

Paired with low humidity and a chance of dry thunderstorms that could produce lightning strikes, more fires could ignite and rapidly grow.

It has already been a busy year for fires, with more than 44 800 ignitions across the US – more than any other year in the last decade, according to NIFC statistics. More than 16 500 wildland firefighters and support staff are currently battling blazes covering a combined total of roughly 369 235 ha (912 400 acres).

Forecasts for August 24–25 indicate a slight decrease in temperature and increased humidity, providing some relief for firefighting operations.

Fire risks are expected to persist even after the heatwave ends. With limited moisture across parts of California and the Pacific Northwest, fire danger is projected to increase through the next month and into October.

Rishav Kothari

I am an Assistant Editor and Severe Weather & Science Journalist at The Watchers, specializing in real-time severe weather coverage, geophysical event reporting, and research-driven scientific analysis. You can reach me at rishav(at)watchers(.)news.

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