Smoke drifted across parts of Sonoma County on Tuesday as crews carried out an 89-acre prescribed burn at Carrington Coast Ranch Regional Park and Open Space Preserve near Bodega Bay. Sonoma County Regional Parks, Cal Fire’s Sonoma-Lake-Napa Unit and the Sonoma County Fire District began igniting the area at about 8 a.m. The burn site is east of Highway 1, between Coleman Valley Road and the Salmon Creek Estuary, on land that has not yet opened to the public. Crews expected operations to continue through the day. The planned fire prompted air-quality advisories as haze spread inland. The Bay Area Air District advised people who notice smoke to stay indoors with windows and doors closed, if temperatures allow. Older adults, children and people with asthma, COPD or other respiratory conditions were encouraged to limit outdoor activity until conditions improve. Air quality can be checked on AirNow’s Fire and Smoke Map. Officials said the smoke came from the permitted burn, not a wildfire, and asked the public not to call 911 to report it. Sonoma County Regional Parks planned the operation with the Northern Sonoma County Air Pollution Control District to reduce smoke impacts on nearby communities. The project aims to improve coastal prairie habitat, reduce invasive weeds and surface fuel loads, protect historic park structures from wildfire and provide firefighter training. Prescribed burns are intentionally set under selected weather conditions to remove vegetation that could feed future fires while supporting ecosystem restoration. State air-quality officials say prescribed burns generally produce less smoke than large wildfires and must meet smoke-management requirements. Even so, smoke can affect nearby residents, particularly people with respiratory sensitivities.