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加利福尼亚州官员和景观预告员敦促沐日出行者避让说念路，并从头磋商圣诞旅行筹备黄南设备保温，因为系列的冬季风暴带来了抓续的降雨、强风和山积雪。

好意思国国景观局警告称，风暴于周二夜开动转移，并瞻望在圣诞节前夜加重。当局暗意，由于多条大气河流瞻望将席卷该州，数百万筹备跨州出行的东说念主们很可能会面对其危急、以致可能法通行的路况。

“若是你筹备在圣诞节假期技艺出行，请从头磋商你的筹备，”好意思国国景观局洛杉矶分局景观学阿里尔·科恩在周二的场新闻发布会上说说念。

景观预告员暗意，南加州可能迎来多年湿气的圣诞节，并警告昨年月野火过的地区可能出现山洪、泥石流和碎片流。洛杉矶县官员称，他们正在挨挨家见知约38户危住户恐惧。

萨克拉门托河谷和旧金山湾区大部分地区周五前抓续处于洪水监测和强风警报状态。景观部门预警称，内华达山脉部分地区周三将出现强降雪和阵风，致“近乎白茫”的天气景色，铁皮保温施工山区隘口的通即将“确切法达成”。

北部沿海地区还可能碰到强雷暴天气，并存在较小的龙卷风风险。

当地官员暗意，北加州地区因暴雨和山洪已激发多起水上拯救事件，并酿成至少东说念主物化。沙斯塔县警长迈克尔·L·约翰逊于周文告干涉进犯状态，以搪塞抓续强降雨，同期便于州政府协助开展减灾及搜救四肢。

好意思国国景观局景观学迈克·沃福德暗意黄南设备保温，南加州往年同期降雨量往往为.5至1英寸（1.3至2.5厘米），但本周很多地区的降雨量可能达到4至8英寸（1至2厘米）。山区降水量可能大。中部海岸部分地区阵风风速或将达到每小时6至8英里（96.5至127.8公里）。

官瞻望，狂风雨技艺将出现多处说念路封锁和机场延误情况，树木倒塌和电线断裂也可能发生。本周洛杉矶部分地区已发布疏散警告。

该县在失火灼区域周围竖立了K型护栏（种路障），以在暴雨技艺禁滑落的碎石。代表阿尔塔迪纳地区的洛杉矶县防守凯瑟琳·巴杰暗意，住户还可取费沙袋用以保护住宅。

洛杉矶巡警局局长吉姆·麦克唐奈暗意，很多身处山火毁区域的东说念主在接到疏散见知后决定不恐惧。他敦促这些东说念主从头磋商这决定。

他暗意：“这场风暴带来的要挟着实存在且一衣带水。”

地和州政府官员正加紧准备搪塞本周可能发生的进犯情况。州政府已向沿海及南加州多个县部署了济急资源和拯救东说念主员。加州国民警卫队也随时待命提供赈济。

大气河流是形成于海洋上空、流经天外的狭长水汽带，它将水分从热带地区运输至北纬地区。

好意思联社记者索菲·奥斯汀（加利福尼亚州萨克拉门托）和杰茜卡·希尔（内华达州拉斯维加斯）对本报说念亦有孝敬黄南设备保温。

California officials and weather forecasters urged holiday travelers to avoid the roads and reconsider Christmas travel as a series of powerful winter storms brought relentless rains, heavy winds and mountain snow.

Storms began to move in late Tuesday evening and were expected to intensify into Christmas Eve. Authorities said the millions of people expected to travel across the state will likely meet hazardous, if not impossible, conditions as several atmospheric rivers were forecast to make their way through the state, the National Weather Service warned.

If youre planning to be on the roads for the Christmas holidays, please reconsider your plans, said Ariel Cohen, a National Weather Service meteorologist in Los Angeles, during a Tuesday news conference.

Forecasters said Southern California could see its wettest Christmas in years and warned about flash flooding, mudslides and debris flows in areas scorched by last Januarys wildfires . Los Angeles County officials said they were knocking on the doors of some 38 particularly vulnerable households to order them to leave.

Much of the Sacramento Valley and the San Francisco Bay Area were under a flood watch and a high wind warning through Friday. Forecasters warned heavy snow and gusts were expected to create near white-out conditions Wednesday in parts of the Sierra Nevada and make it nearly impossible to travel through the mountain passes.

Theres also a risk of severe thunderstorms and a small chance of tornadoes along the northern coast.

Heavy rain and flash flooding already led to water rescues and at least one death in Northern California, local officials said. Shasta County Sheriff Michael L. Johnson on Monday declared a state of emergency to prepare for more rain and allow the state to help with hazard mitigation and search and rescue operations.

Southern California typically gets half an inch to 1 inch (1.3 to 2.5 centimeters) of rain this time of year, but this week many areas could see between 4 and 8 inches (1 to 2 centimeters), National Weather Service meteorologist Mike Wofford said. It could be even more in the mountains. Gusts could reach 6 to 8 mph (96.5 to 127.8 kph) in parts of the central coast.

Officials expect multiple road closures and airport delays during the storms. Downed trees and power lines are also possible. Parts of Los Angeles are under evacuation warnings this week.

The county put up K-rails, a type of barrier, around the burn scar to help catch sliding debris during rainstorms. Residents could also pick up free sandbags to protect their homes, said Kathryn Barger, a Los Angeles County supervisor representing Altadena.

Many people in burn scar areas decided not to leave after receiving the evacuation notification, Los Angeles Police Department Chief Jim McDonnell said. He urged them to reconsider.

The threat posed by this storm is real and imminent, he said.

Local and state officials are gearing up to respond to emergencies through the week. The state has deployed resources and first responders to a number of counties along the coast and in Southern California. The California National Guard is also on standby to assist.

An atmospheric river is a long, narrow band of water vapor that forms over an ocean and flows through the sky, transporting moisture from the tropics to northern latitudes.

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Associated Press writers Sophie Austin in Sacramento黄南设备保温, California, and Jessica Hill in Las Vegas contributed to this report.