风暴袭击加州南部引发洪水 多地进入紧急状态

Core Points - A severe storm has impacted Southern California, leading to widespread flooding and transportation disruptions [1][2] - Governor Newsom has declared a state of emergency in multiple counties, including Los Angeles County, to facilitate resource allocation [4] - The storm is caused by an "atmospheric river," resulting in significant rainfall and potential mudslides in affected areas [1][4] Group 1: Weather Impact - The storm brought initial heavy rainfall on the evening of December 23, with rainfall rates exceeding 2.5 cm per hour in some areas [1] - By the morning of December 24, rainfall in certain foothill regions reached between 10 to 20 cm, with forecasts predicting over 30 cm by the end of the week [1] - The National Weather Service has issued flash flood warnings and tornado warnings for specific areas, indicating the severity of the weather conditions [2][4] Group 2: Emergency Response - Approximately 380 households in vulnerable areas have been issued evacuation orders due to the risk of mudslides and debris flows [2] - Emergency resources have been deployed to coastal regions and counties in Southern California, with the National Guard on standby [4] - The Red Cross is providing shelter in multiple communities for those affected by the storm [2]