Reuters: An Arctic air mass has sent temperatures plunging across California, threatening the state's lucrative citrus harvest, its winter vegetables and its more cold-sensitive strawberry crop, weather and agricultural experts said on Friday.
Temperatures throughout the state fell by as much as 20 degrees Fahrenheit (11 degrees Celsius) below normal on Thursday and Friday as snowfall and sub-freezing conditions forced a 17-hour closure of a key highway, Interstate 5, through the mountains north of Los...