California floods: Pineapple train storm hits Los Angeles
Southern California, particularly Los Angeles, is on high alert following severe warnings from the National Weather Service about flash floods and unprecedented winter storms. These rapidly developing conditions are the result of a deep low-pressure system bringing torrential rain, prompting an immediate response from local and state authorities to protect lives and property.
The “pineapple train” atmospheric phenomenon
The current storm is fueled by what is scientifically known as the “Pineapple Express,” a powerful type of atmospheric river. This phenomenon acts as a conveyor belt of intense moisture, drawing water vapor from warm tropical regions near the Hawaiian Islands and pumping it directly toward the West Coast of the United States. Meteorologists indicate that this atmospheric mechanism will cause record rainfall in just a few days, equivalent to what typically falls in several months, placing immense strain on infrastructure and drainage systems.
Declaration of a state of emergency and official response
In a proactive move to address potential consequences, California Governor Gavin Newsom quickly declared a state of emergency in several counties, most notably Los Angeles. This legal measure aims to expedite mobilization efforts, provide necessary financial and logistical resources to rescue teams, and facilitate the deployment of the National Guard if needed. Authorities warned that the danger extends beyond water, encompassing "life-threatening flash floods," as well as heavy snowfall and strong winds in mountainous and elevated areas.
Risks of mudslides and past forest fires
Authorities are particularly concerned in areas ravaged by devastating wildfires last January, such as the Pacific Palisades and Malibu. It is scientifically established that burned soil loses its ability to absorb water, becoming a water-repellent surface and significantly increasing the likelihood of debris flows and mudslides. The first storm surges began to take their toll Tuesday night, with residents waking to scenes of uprooted trees and power outages affecting thousands of homes, prompting the opening of emergency shelters and evacuation orders in the most vulnerable areas.
Travel warnings and weather forecasts
Amid ongoing warnings, meteorologist Ariel Cohen stated that the period from Wednesday night through Friday will be the most critical, with significant flooding and dangerous landslides expected in mountainous areas and valleys. Up to 30.5 centimeters of rain are predicted in some areas. Cohen issued a stern warning to citizens: "If you are planning to travel during the Christmas holidays, please reconsider your plans," emphasizing that major roads may be impassable and pose a deadly risk.
