A man went on a shooting rampage in California on Wednesday, killing five people including his wife, before taking his own life, a police spokesman told AFP.
Firefighters battled on Saturday to outflank a wildfire that has forced the closure of an interstate highway in northern California.
A firefighter has died while battling an enormous wildfire in northern California, authorities said late on Monday.
More than 30,000 personnel, including firefighters from across the United States and nearly 140 from Australia and New Zealand, are battling the blazes.
The fire, which was 5% contained, was being fuelled by dry brush covering steep terrain and stoked by erratic wind gusts during the night.
More than 38,000 people remained under evacuation orders on Sunday in and around the city of Redding, about 257 km north of the state capital Sacramento.
Thousands of people in Southern California had fled a deliberately set blaze southeast of Los Angeles by Saturday morning, after the state's governor requested federal aid to help battle a deadly fire elsewhere.
One person was killed in a raging, out-of-control wildfire that sent residents racing to flee a northern California city on Friday.