Did Heavy Rainstorms in California Claim Three Lives This Christmas?

Heavy rains from atmospheric rivers have resulted in severe flooding and mudslides across California, leading to three fatalities as of Christmas night. The storms have caused widespread disruption with significant rainfall, prompting evacuation orders and emergency responses throughout the state.

Last updated: 25 December 2023 (BST)

What’s happening now

California is currently grappling with the aftermath of intense storms driven by multiple atmospheric rivers. These weather systems have unleashed torrential rain, particularly across Los Angeles and the broader southern California region. Major roads have been shut down, and emergency responders are engaged in numerous rescue operations as floodwaters rise, posing significant risks to those trapped in vehicles. Governor Gavin Newsom has declared a state of emergency to facilitate resource allocation and support for affected areas.

Key takeaways

• Three fatalities reported due to flooding and related incidents.
• 11 inches (27 cm) of rain recorded in some Los Angeles County areas.
• Evacuations and emergency declarations are in effect across multiple counties.

Timeline: how we got here

Key developments regarding the atmospheric rivers impacting California include:

• 20 December 2023: Initial reports of heavy rain begin as atmospheric rivers move towards California.
• 21 December 2023: Flooding starts in southern California, prompting local warnings.
• 24 December 2023: Fatalities reported as emergency responders conduct rescues.
• 25 December 2023: Governor Newsom declares a state of emergency in affected counties.

What’s new vs what’s known

New today/this week

The latest reports indicate that the storms are expected to continue impacting California through Friday, with further rainfall anticipated. Warnings for flash floods have been issued, and significant wind gusts have been recorded, resulting in additional risks of property damage and power outages.

What was already established

Prior to this week's storms, California was already experiencing a series of weather disturbances this winter. The presence of atmospheric rivers, which transport moisture from tropical regions, has been a recurring theme, exacerbating flood risks in areas still recovering from previous wildfires.

Impact for the UK

Consumers and households

For UK residents, the implications of these extreme weather events can be felt indirectly through global supply chains, especially in sectors reliant on Californian agriculture. Flooding can disrupt food production and transport, potentially leading to price increases in supermarkets.

Businesses and jobs

Businesses across California, particularly in logistics and agriculture, are facing disruptions due to flooding and power outages. This may lead to temporary job losses and decreased productivity in affected sectors.

Policy and regulation

The UK government may observe California's response to these atmospheric events, particularly regarding emergency management and disaster preparedness. Policies surrounding climate resilience could be influenced by such extreme weather patterns.

Numbers that matter

• 11 inches (27 cm) of rainfall reported in some areas of Los Angeles County.
• Wind speeds exceeded 100 mph (161 km/h) in parts of the Bay Area.
• Approximately 100,000 residents were without power as of Thursday evening.

Definitions and jargon buster

• Atmospheric river: A narrow corridor of concentrated moisture in the atmosphere that can cause heavy rainfall and flooding.
• Flash flood warning: A notification issued when rapid flooding is imminent or occurring.
• State of emergency: A governmental declaration that temporarily enhances the powers of officials to respond to a disaster.

How to think about the next steps

Near term (0–4 weeks)

Residents in affected areas should remain vigilant as additional storms are predicted. Emergency services will be on high alert, and residents are advised to heed evacuation orders and safety warnings.

Medium term (1–6 months)

It is likely that recovery efforts will focus on rebuilding infrastructure and providing aid to those impacted by the flooding. Long-term plans may also address flood prevention and climate resilience strategies.

Signals to watch

• Weather forecasts indicating further storms or changes in atmospheric conditions.
• Reports on recovery efforts and government response effectiveness.
• Data on power restoration and infrastructure repairs in affected regions.

Practical guidance

Do

• Stay informed through local news and weather updates.
• Follow evacuation orders and safety advisories from authorities.
• Prepare emergency kits with food, water, and essential supplies.

Don’t

• Do not attempt to drive through flooded areas.
• Avoid unnecessary travel during severe weather conditions.
• Neglect safety alerts from emergency services.

Checklist

• Check weather forecasts regularly.
• Have an emergency plan ready with family members.
• Keep a supply of non-perishable food and bottled water.
• Ensure mobile phones are charged and have backup power sources.
• Stay in touch with neighbours and community resources.

Risks, caveats, and uncertainties

The situation remains fluid, with the potential for changing weather patterns and additional storms. The predictions related to rainfall amounts and the exact areas of impact are subject to adjustment as meteorological data is updated. Public safety remains a priority, and individuals should remain cautious.

Bottom line

The ongoing atmospheric rivers have posed significant challenges for California, resulting in loss of life and widespread disruption. UK residents should monitor the situation, as it highlights the potential consequences of extreme weather, prompting considerations for emergency preparedness and climate resilience strategies moving forward.

FAQs

What caused the flooding in California?

The flooding in California is primarily due to atmospheric rivers, which are moisture-laden weather systems that have brought unprecedented rainfall to the region.

How many fatalities have been reported due to the storms?

As of Christmas night, three fatalities have been reported as a result of the severe weather conditions in California.

What should residents do during such storms?

Residents should stay informed, follow evacuation orders, avoid unnecessary travel, and prepare emergency supplies to ensure their safety during storms.