Bob Ferguson declared a statewide emergency in Washington state as an unusually potent atmospheric river brought severe weather, torrential rain, and nearly 5 trillion gallons of water.The powerful storm has caused widespread flooding, mudslides, extensive road closures, power outages affecting over 17,000 customers, and trapped residents, leading to evacuation orders for tens of thousands.The National Guard deployed hundreds of personnel for high-water rescues, and forecasters from the National Weather Service continue to warn of critical conditions and "catastrophic flooding" in areas like Mount Vernon and Skagit County.