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The Iberian nations are again battling the aftermath of significant flooding after Storm Claudia unleashed heavy rain and powerful gusts last week.

Claudia's Origin and Path

This meteorological event originated from a region of depressed atmospheric pressure that had beforehand driven early season chilly and snowy weather through the eastern regions of Canada and the American north-east at the start of November.

The system moved eastward across the Atlantic Ocean during the second weekend of November before losing momentum and stopping to the north-west of the Iberian region, caught in the trough of an increasingly amplified air current.

Impact on the Iberian Peninsula

Spain's Galicia area in the northwest was hit first, with three to six inches of rain falling along its Atlantic coast in just a single day up to Wednesday night as a leisurely moving system of rain drifted across the western areas of the peninsula.

Additional rainfall and electrical storms on Thursday led to floods to areas in Portugal where an older couple lost their lives in Lisbon after floodwaters from the swollen Tagus flooded their dwelling as they rested.

Stormy conditions continued into the weekend, with a twister tearing through a campsite and a close-by inn in Albufeira in southern Portugal on the weekend's Saturday, killing an elderly British lady and harming two dozen and eight persons.

Broader Impacts across Europe

Claudia had wider effects across the western European nations. By pulling tropical air from the warmer regions, the system helped temperatures in France's south-west to 85.6 degrees Fahrenheit, the state's maximum ever autumn temperature.

By Friday, this hot and moist atmospheric body met a chilly atmospheric body across the northern areas of Europe, creating a rainfall belt stretching from western Ireland to the Russian Federation.

In the UK, this stalling band of rain brought exceptionally large precipitation amounts, resulting in major inundations in the principality of Wales.

As the storm loses strength in the coming days, the frigid air will push south, providing the continent its initial glimpse of winter.

Parallel Events in California, USA

California encountered a so-called atmospheric river the previous week, bringing heavy rain and high-velocity gusts that resulted in flash flooding and debris flows in zones impacted by blazes previously in the year.

In excess of 50 millimetres of rain fell in southern California on last Friday, with a further 50mm widely across the state on Saturday last.

More than 100mm of rain accumulated over shoreline regions of the state's south in aggregate, hitting a full 200 millimetres in locations at higher elevations.

This meteorological feature is a plume of tropical, saturated air coming from the tropical or subtropical regions.

Regions previously burned including Palisades and Altadena experienced the most intense the rapid inundations and mudslides, forcing residents to flee.

Elsewhere in California, a 71-year-old man lost his life after his car was swept off a inundated overpass, and a child of seven years and her father were swept into the sea by large waves on the California's Central Coast.