SACRAMENTO (AP) - The first in what is expected to be a series of drenching winter storms has prompted flood warnings and swelled Northern California rivers to their highest levels in seven years. Warnings went into effect across the northern half of the state after the first storm swept through Tuesday and Wednesday. Steady downpours and rising rivers led to an evacuation, scattered power outages, and flooded roads and parks. Water district officials in Sacramento closed a flood gate on the American River as a precaution. "It's been several years since we've had this widespread of flooding, and we're not...