Wildfire smoke may cause tens of thousands of premature deaths

A study estimates how many early deaths occurred from California wildfire smoke exposure over 11 years

Corral Fire in San Joaquin County

The Corral Fire in San Joaquin County, Calif., began on June 1 and was spurred by strong winds and dry grass. The fire was fully contained on June 6.

California Department of Forestry and Fire Protection via AP

Wildfire season got off to an early start in Northern California with the Corral Fire, which started burning grasslands in San Joaquin County on June 1 and grew to cover more than 50 square kilometers.