Wildfire in Napa County forces evacuations

A wildfire forced evacuations in Napa County on Tuesday and sent smoke cascading toward the East Bay, authorities said.

The so-called Toll wildfire northwest of Calistoga had burned about 50 acres by 2 p.m., according to Cal Fire. Crews had not contained any of it, and the wind was sending smoke and flames toward the Napa Valley.

The area was under a red flag warning for severe fire conditions on Tuesday.

The blaze in Napa County was one of several burning in Northern California, according to Cal Fire.

Smoke from the so-called Denverton fire in Sonoma County also was pushing toward the Bay Area, amplifying dirty air that already caused authorities to issue a “spare the air” alert for the second straight day. Cal Fire said it started about 1:15 p.m. and immediately burned 25 acres. It was not contained at all.

The Thompson fire in Butte County began about 11:45 a.m. and had burned 75 acres by 1:45 p.m., Cal Fire said. It was 0% contained. The Yolla fire in Shasta County began about 10:30 a.m. and Cal Fire said it burned 19 acres in its first three hours. It was 10% contained.