Long-term exposure to wildfire smoke linked to increased risk of dementia diagnosis, new study finds

California’s wildfires are causing a public health problem due to the increasing size and frequency of the fires and the resulting smoke. A new study suggests a link between long-term exposure to wildfire smoke and an increased risk of dementia. The research analyzed data from over 1.2 million people aged 60 or older in Southern California from 2009 to 2019. It found that exposure to PM2.5 particles from wildfire smoke was strongly associated with a higher likelihood of dementia diagnoses. This association was more pronounced among minority groups and in high-poverty areas. Previous research has shown that PM2.5 pollution increases the risk of various health issues including dementia. Breathing in PM2.5 particles can lead to inflammation and damage in the brain, potentially contributing to the development of Alzheimer’s disease. The frequency of extreme fire weather days in California has more than doubled since the early 1980s. Taking steps to protect individuals from air pollution, such as staying indoors on poor air quality days and using air filtration systems, is recommended. People with respiratory conditions should consult with healthcare providers to prepare for wildfire conditions. The study highlights the importance of identifying and addressing modifiable risk factors for dementia.