Around 23,000 people have been displaced and a state of emergency declared in California as wildfires rage in the north of the US state.<br /><br /> An elderly, disabled woman is known to have died as flames consumed her building when the fires erupted on Saturday (September 12).<br /><br /> Others, such David Clark, managed to flee. He spoke from a nearby evacuation centre, tents clearly visible in the background.<br /><br /> “My house burnt up in probably about 30 minutes. I lived on Hoberg south, which is basically where the fire originated from,” he said. “We were at a soccer game, got home a little after 2pm. Our house was gone by three o’clock and we really don’t have anything left.”<br /><br /> CA’s #ValleyFire has burned an area twice the size of San Francisco, still just 5% contained.<br />http://t.co/rtbV5ODRip pic.twitter.com/n7ami29NCU— Eric Holthaus (@EricHolthaus) September 14, 2015<br /><br /> Janet Mondragon, from Middletown, showed an image of her house, apparently engulfed in flames.<br /><br /> “That’s my house,” she said. “That’s