Reuters: A combination of record high temperatures and sparse rainfall during California's three-year drought have produced the worst conditions in 1,200 years, according to a study accepted for publication by the American Geophysical Union (AGU). The state has gone through numerous periods of dry weather, with as little or less rainfall as the past few years, but scientists looking at the cumulative effects of temperature, low precipitation and other factors said that it all adds up to the worst conditions...