Fear and uncertainty surrounding the wildfires in California appear to be weighing on shares of Edison International, whose Southern California Edison is the power utility for the areas directly surrounding the city of Los Angeles.

The onslaught of wildfires in Los Angeles and surrounding southern California communities has caused a dramatic drop in the stock of Edison International, the utility that serves much of the affected area, affecting the utility’s 401 (k) plan investors who hold company stock.

More than 4 million people were left in the dark (and the smoke) on Wednesday as fires raged around Southern California.

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.