As wildfires blaze across California, here is how inhaling smoke could affect your health, from itchy eyes to dementia risk.

Southern California — with sprawling cities, clogged freeways and heavy industry — is already notorious for some of the worst air quality in the nation. This week's wildfires are putting millions of people at risk for immediate health problems and longer term issues.

Buildings burned and other were charred from the Eaton Fire near Altadena, California. (Credit: Erika Hernandez)