California town urged to evacuate after torrential winter storm

Two communities in Northern California were accessible only by boat Wednesday after a rain-swollen river overflowed its banks overnight and left roads impassable, authorities of them, the small city of Guerneville, just north of San Francisco  ’is officially an island,’ the Sonoma County Sheriff’s Office said in a statement.A short time later, an official said the nearby town of Monte Rio was also isolated by floodwaters with all roads leading to it swamped. The swollen Russian River was forecast t