REDDING, Calif.—A woman has been arrested on suspicion of starting a Northern California wildfire that spread rapidly, burning homes and prompting evacuation orders Thursday in a rural community, authorities said. Workers at a nearby quarry reported seeing a woman acting strangely and trespassing in the area in Shasta County where the Fawn Fire was sparked Wednesday afternoon, the California Department of Forestry and Fire Protection said in a statement. Later Wednesday, Alexandra Souverneva walked out of the brush near the fire line and approached firefighters and told them she was dehydrated and needed medical help, Cal Fire said. Souverneva, 30, was taken out of the area for evaluation and treatment. During an interview with Cal Fire and law enforcement, officers came to believe Souverneva, of Palo Alto, was responsible for setting the fire, officials said. She was arrested and booked into the Shasta County Jail. It wasn’t immediately known if …