Six people have died across France, Belgium, Spain and the Netherlands as strong winds and rain from Storm Ciaran batter Europe, closing schools, airports and halting train services.
A truck driver was killed by a falling tree northeast of Paris and a second death was reported in the French city of Le Havre.
In Madrid, a woman died when a tree dropped on her car while another woman in the Netherlands also fell victim to the storm.
Two people were killed, including a five-year-old, by a falling tree in Belgium, local news agency Belga reported.
Around 1.2 million French households were left without electricity on Thursday and authorities in Finistere, Brittany urged people to stay at home.
Winds which were hitting 129 mph, leading to reports of 66-foot waves off the coast.
Photos from Brittany show cars flattened by fallen trees and boats being washed onto the sand at Pornichet.
Storm Ciaran, which follows on the heels of Storm Babet two weeks ago, was driven by a powerful jet stream that swept in from the Atlantic, unleashing heavy rain and furious winds that have already caused heavy flooding in Northern Ireland and parts of the UK.
Amber warnings are in place for the entire south coast of England while London is under ‘yellow’ warnings for wind and rain. The storm has already caused significant flooding in Northern Ireland.
France's Interior Minister Gerald Darmanin told reporters that in addition to the death of the truck driver, 15 people, including seven firefighters, had been injured. One person was seriously injured in the northern French town of Roubaix, he said.
About 1,300 people had to be relocated to camp sites or shelters, and several houses were evacuated in the Finistere city of Brest after a crane fell, Mr Darmanin said on social media.
"I repeat: stay at home," local prefect Alain Espinasse told RTL radio.
The storm in France showed some signs of easing with the Meteo France weather service reducing its alert for strong winds in Mache, Finistere and Cotes d'Armor from red to orange.
In the UK, the Channel Islands were among the worst hit areas, with windows blown in and one roof ripped off a house on Jersey, forcing families to move into nearby hotels.
Dutch Airline KLM scrapped hundreds of flights to and from Amsterdam, while international trains from the Dutch capital to Paris were also cancelled, and shipping lanes in the southwest of the country were closed. Airport operator AENA said 42 flights in Spain were cancelled following the cancellation of 21 flights on Wednesday.
Spain's state-run weather agency AEMET also issued red warnings on Thursday for the northern regions of Galicia and Cantabria, where waves of as high as nine metres were expected.
La Pinilla, a ski resort north of Madrid, and Estaca de Bares in Galicia registered wind velocities of more than 150 kph, AEMET said.