(CNN) Storm Eunice tore down rooftops and trees, crushed cars and sent planes skidding on London's runways as millions of people across the United Kingdom hunkered down at home to stay out of hurricane-strength winds.
The storm led to 10 fatalities across the UK and parts of western Europe, with wind speeds as high as 122 miles per hour (mph) -- the fastest on record in the country. High wind speeds is what make wind storms intense.
The UK Met Office expanded its rare "danger-to-life" weather alert ahead of the storm on Friday morning to include most of the south of England and some of Wales.
A woman was killed in north London's Muswell Hill on Friday after a tree fell on her car, according to a statement from the London Fire Brigade, while a man in his 50s was also killed on Friday while driving his car in Liverpool, according to Merseyside Police.
In Hampshire, one man died and another was seriously injured in a car accident. Both men, in their 20s, were in their vehicle when a tree fell on top of it during the storm. Police are investigating the exact circumstances of the incident and have appealed for witnesses.
In Ireland, which is also experiencing strong winds from Eunice, a man in his late 60s was killed after being hit by a falling tree, the national police service, known as the Gardaí, confirmed to CNN.
The man, who has not been named, died in County Wexford, southeastern Ireland, and was pronounced dead at the scene.
The storm also wreaked havoc in mainland Europe, with German broadcaster ZDF reporting two deaths in Germany, with one person falling from his roof and the other crashing his car into a fallen tree.
A 79-year-old English man also died in western Belgium after strong winds knocked him off his barge and into the water of a marina, state broadcaster RTBF reported.
Meanwhile, the Amsterdam-Amstelland fire brigade reported three deaths due to fallen trees in the Netherlands on Friday, while most of the country was under the highest weather alert with people advised to stay home ahead of the storm.
The storm has damaged buildings in the UK, with footage shared to social media showing the roof of London's O2 arena severely damaged by strong wind.Op de #vrijheidslaan in Amsterdam is een boom op een fietser terecht gekomen. Deze fietser is hierdoor overleden.
Large sections of the fabric roof were shredded and ripped off by the gusts, while the building was evacuated and closed.
On its website, the 02 said an event at the venue Friday night would be rescheduled.
"The safety of our visitors remains of paramount importance, and we will continue to assess the ongoing situation and act accordingly," the statement said.
Elsewhere, a CNN reporter witnessed part of a rooftop flying off a home in the southwestern London area of Surbiton. The roof crushed a car parked on the street.
Social media video showed a building housing lifeboats with part of its rooftop blown off at Sennen beach in the country of Cornwall, where strong winds were pushing waves above a seawall. Police in Cornwall and neighboring Devon said they had received high volumes of calls about flying debris, collapsed roofs and fallen trees.
Other video footage shared on Twitter showed a church spire in Somerset collapsing in high winds.
Residents around the UK also posted images on social media of collapsed fences and trees in roads.
Many homes were also left without power on Friday, including small pockets of London and larger areas of southern England.
As dozens of flights were canceled across London's major airports, more than 200,000 people tuned in to watch a live stream on YouTube of planes landing at London's Heathrow. The aircraft were seen battling strong gusts as they came into land, some of them wobbling mid-air, others skidding from side to side once they hit the runway.
The video, on the Big Jet TV channel, was accompanied by comical commentary by presenter Jerry Dyer, who kept viewers entertained by offering words of encouragement to the pilots, at one point saying: "Come on mate, you can do it!"
British Airways said it was grounding a number of planes and expected "significant disruption," but that most flights would go ahead as planned.
"Safety is our number one priority, and we're canceling a number of flights," British Airways said in a statement.
The airline said it was looking at deploying larger aircraft where possible to better withstand the weather.
Rail companies have urged customers to reconsider their plans, with blanket speed restrictions in place for most lines across the country.
In a statement Friday, Network Rail warned of high winds blowing trees and other debris onto railway lines, which then block trains and cause delays and cancelations.
Authorities are expecting gusts to cause travel delays, power cuts and possible mobile phone coverage outages throughout Friday.
Meteorologists have also raised the possibility of a sting jet, the weather phenomenon which made the 1987 Great Storm so destructive and deadly. Eighteen people were killed in that storm and 15 million trees were blown down in winds that topped 100 mph.
A sting jet is a very narrow and concentrated blast of powerful, upper-level winds that can form inside powerful weather systems. It descends to the the Earth's surface and can last a few hours, potentially causing damage to life and property, according to CNN meteorologist Derek Van Dam.
"The 'sting' refers to the cloud formation it creates, which resembles a scorpion's stinger," he said.
Eunice is the second storm in a week for the UK after Storm Dudley battered parts of Scotland, northern England and Northern Ireland Wednesday, leaving thousands of homes without power. Those homes have since been reconnected.
Hannah Cloke, professor of Hydrology at Britain's University of Reading, urged people to stay home where possible.
She said people should not to take the red alert "lightly," as the winds were likely to uproot trees and roof tiles.
"If you're hit by one of those you will be seriously hurt or killed. Wind that strong will sweep people and vehicles off streets, and topple electricity lines," she said.
There is little to suggest any link between human-made climate change and the frequency and intensity -- or windspeeds -- of storms in northern Europe at current levels of global warming.
But damage from windstorms are still getting worse because the rainfall associated with them is becoming more intense, a trend that many scientific studies do link to climate change. Sea level rise also plays a role.
"With more intense rainfall and higher sea levels as human-caused climate change continues to heat the planet, flooding from coastal storm surges and prolonged deluges will worse still further when these rare, explosive storms hit us in a warmer world," Richard Allan, a climate scientists at the University of Reading, said in a statement.
The Intergovernmental Panel on Climate Change warns that if global temperatures rise by 2 degrees Celsius, compared with levels before industrialization, then northern Europe would start to see an increase in the frequency of severe windstorms.
Temperature rise is currently at around 1.1 degrees Celsius, according to conservative estimates. The world is on track for warming well above 2C, according to an analysis, which looked at governments' plans to cut greenhouse gas emissions at the COP26 climate talks last year.