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Police have detained 780 people involved in violent clashes in Paris and other French cities that erupted after Paris Saint-Germain won the Champions League title.

Interior Minister Laurent Nuñez said 57 officers were wounded, with most suffering minor injuries, as football fans set off fires and vandalised shops on Saturday night (Sunday morning AEST). One small group even tried to storm a Paris police station.

Nuñez said at a news conference on Sunday that "the situation has been largely brought under control".

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"Most of the celebrations took place peacefully" across the French capital, he said, noting most incidents happened in the Champs Elysees neighbourhood and close to the Parc des Princes stadium in western Paris where fans had gathered to watch the match.

Police also intervened five times overnight to prevent people from blocking traffic on the main ring road around Paris, he said.

Nuñez said incidents took place in about 15 cities in France, describing "one to two" shops vandalised in each other than Paris. He said 780 people were detained in all, with 480 of them in the Paris area alone.

The Paris prosecutors' office said 277 people have been formally placed in police custody, including 82 minors, for alleged offences. Most were for assault of police officers while other allegations include theft, vandalism and disturbing the public order.

One serious accident involved a driver losing control of a car that rammed into a restaurant's terrace, leaving two people wounded including one seriously, Nuñez said.

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But Nuñez said that planned celebrations for the team's win on Sunday afternoon at the Champ de Mars, near the Eiffel Tower, would go ahead as scheduled. He warned that police would respond with "firmness and determination" to any potential violence.

The PSG team will then be hosted by French President Emmanuel Macron at the Elysee presidential palace.

Fans began celebrating in Paris after the final whistle in Budapest, Hungary, where Paris Saint-Germain won by beating Arsenal on penalties in a dramatic final.

Fans marched along the avenues near Paris' Arc de Triomphe monument, with some setting off flares and blaring car horns. About 20,000 people gathered on the Champs-Elysees, where police worked to contain the crowd.

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The Paris police prefecture said smaller groups caused disturbances in various locations, with some vandalising shops and setting fires to rubbish and hire bicycles in the streets.

Cars were also set ablaze. Those who attempted to storm a police station in the posh eighth Arrondissement neighbourhood were dispersed, police said.

In May last year following PSG's first title, 201 people were injured in the French capital and police made more than 500 arrests across France.

A storm has pummelled Western Australia, sending trampolines and sheds flying and causing flash flooding and power cuts.

And the Bureau of Meteorology warns the weather is set to turn even worse.

In Mandurah, south of Perth, a neighbour's shed was sent crashing into a family's backyard pool.

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"It came over that side, over the fence, and then the next thing we know we got a free home," the owner said.

Down the road, Dawn Crawford was holding on, battling the wind to stop her fence from giving way.

"I was here holding this for an hour," she said.

Flash flooding forced Perth locals to get creative for a morning coffee.

"We've had jellyfish, we've had ducks, and then we've had our regulars, which is great," joked Rob Strahan from Bayswater Oarhouse.

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High swells in Hillarys became a playground for surfers.

Some boats sank as the Swan River spilled over its banks.

SES crews were kept busy responding to more than 380 calls for help since 5pm on Saturday.

Power lines came down across multiple suburbs, with more than 28,000 Western Power customers without power.

"I was in bed and the kids come running in and screaming the power's out so wasn't too happy. Wanted to be able to watch the footy this afternoon," Beaconsfield man Steve Tonge said.

A tree smashed a roof narrowly missing Brad Counsel and his dog.

"Gust of wind and then down came the tree," he said.

The storm has already dumped more than 57.4 millimetres of rain in Capel, between Bunbury and Busselton, in the past 24 hours.

Cape Leeuwin, the most south-westerly point of the mainland, recorded wind gusts of 122km/h.

Emergency crews called for everyone in the state's south-east to tie down loose items before the full force hit.

Joey Rawson from the Bureau of Meteorology said the wild weather would be unusual.

"As we progress into the evening this low pressure system really intensifies and it's going to bring conditions that we don't see that often in south-west WA."

Earlier forecasts even predicted the risk of tornadoes.

The wild weather could also hit other states this week.