As wildfires spread through Northern California counties, clouds of smoke and ash are spreading, too, far beyond the flames. Air quality officials have a database that's searchable by ZIP code.
Authorities say at least 23 people are dead in some of the worst fires in the state's history. Hundreds more have been reported missing, and officials say the death toll is likely to climb.
Wildfires that spread quickly in Northern California meant that hospitals had to evacuate on the fly. One woman in the middle of childbirth tells her story.
"Make no mistake," Cal Fire Director Ken Pimlott said in an update around midday Wednesday. "This is a serious, critical, catastrophic event." High winds are predicted to return Wednesday night.
The La Tuna fire near Los Angeles — one of several burning in California, Montana and Oregon — is one-third contained. But firefighters warn there is still much to be done to bring it under control.
Four years of too little water is killing millions of trees in the Sierra, yet some giant sequoias still thrive. Tree-climbing scientists are exploring sequoias branch by branch to find their secret.
A wildfire near San Jose, Calif. has destroyed a dozen homes, and threatens more than 150 structures. Meanwhile, the massive Soberanes fire is still burning two months after it began.