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Firefighters deal with smoke on County Fire - photo Cal Fire Local 2881

Smoke From Fire In Napa County Prompts Health Concerns

MODESTO – Smoke from the County Fire near Napa Valley is affecting air quality in locations throughout the northern and central San Joaquin Valley – notably Mariposa and Merced Counties in our area – prompting local air pollution officials to issue a health cautionary statement Valley-wide.

As of this posting, the County Fire has burned over 44,500 acres and is just 3 percent contained.

(Photo credit Cal Fire Local 2881)

In addition, smoke will continue south with anticipated impacts reaching Kern County by this evening. Smoke impacts are expected throughout the Valley through tomorrow and the health caution will remain in place until the fire extinguished.

Smoke from fires can cause serious health problems including lung disease, asthma attacks and increased risk of heart attacks and stroke. Where conditions warrant, people with heart or lung disease should follow their doctors’ advice for dealing with episodes of particulate exposure.

People with existing respiratory conditions, young children and elderly people are especially susceptible to the health effects from these pollutants. Anyone being exposed to poor air quality or wildfire smoke should move inside to an air-conditioned environment.

Please be advised that the San Joaquin Valley Air Pollution Control District’s Real-time Air Advisory Network (RAAN) monitors are designed to detect the fine particulates (called PM2.5 which are microscopic in size and not visible to the human eye) that exist in smoke.

Ash particles are much larger in size and will not be detected by our monitors. Therefore, an area may be experiencing ash impacts from potential fires while the PM monitor reflects a moderate reading.

If you can smell smoke or see ash that is an indication that you should be treating air quality conditions as “Unhealthy” (RAAN Level 4 or higher) and remain indoors.

Residents can check the District’s wildfire page at for information about any current wildfires and whether they are impacting the Valley.

The District’s Real-time Air Advisory Network (RAAN) provides localized air quality data from an extensive air-monitoring network which allows Valley residents to track PM at any Valley address by visiting

Residents can also follow air quality conditions by downloading the free “Valley Air” app, available in the Apple store or Google Play.

For more information, visit or call a District office in Fresno at 559-230-6000, in Modesto at 209-557-6400, or in Bakersfield at 661-392-5500.

Follow Cal Fire Local 2881 on Twitter

members are working 24-hour shifts on the in Yolo & Napa counties. They are experiencing explosive fire behavior & are being pushed to their limits. Keep up the good work members!

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