Is Thrash on Netflix based on a true story?

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Movies that combine scary shark attacks with bad weather aren’t a recent invention—the Sharknado series proves that.

The new Netflix disaster movie, Thrash, has quickly become the most popular film on the platform this week, and it joins a recent trend of movies focusing on dangerous and destructive events.

Tommy Wirkola, the director of Violent Night, helms this new thriller. It stars Phoebe Dynevor (from Bridgerton) as Lisa, a pregnant woman stranded in a seaside town. A devastating hurricane named Henry causes massive flooding and, even worse, brings a wave of shark attacks.

You might be curious if this movie is based on a true story, and while it seems unlikely, there’s actually some real-life inspiration behind it. Here’s the full story.

Is Thrash on Netflix based on a true story?

Okay, let’s get right to it: this movie isn’t based on anything that actually happened. I did some digging, and there’s no record of a Category 5 hurricane named Henry ever hitting land. And those terrifying shark attacks? Completely made up. Even the town where everything goes down – Annieville – is a product of the screenwriter’s imagination. It’s pure fiction, folks.

The movie begins with a title card stating that Atlantic hurricanes have become 250% more intense, frequent, and longer-lasting since 1980. While strong winds and heavy rain are dangerous, the most life-threatening part of these storms is the surge of water they push inland.

Although these numbers have gone up recently, and storm surges are very dangerous, we haven’t found exact data to support the claim that they’ve increased by a full 250%.

Throughout the movie, characters refer to the storm as potentially a category 6 hurricane. However, this is fictional – the Saffir-Simpson scale currently tops out at category 5, and there’s no official category 6 designation.

It seems writer and director Tommy Wirkola drew some ideas from the frightening realities of natural disasters, though he also adds plenty of typical disaster movie exaggeration.

Climate scientist Chris Gloninger and National Weather Service meteorologist Joe Merchant consulted on the film to help make sure it was scientifically accurate.

Adam McKay, a producer on the film, wanted it to feel relevant to real-world issues and act as a cautionary tale about climate change, similar to a disaster movie.

The idea Tommy originally presented as a far-fetched possibility now feels much more likely to happen, he said.

Recent, severe flooding in Australia – the worst in recorded history and worsened by climate change – washed a lot of murky water into the ocean. Bull sharks are attracted to this type of water because it makes it easier for them to hunt. As a result, there were four shark attacks in just two days.

Basically, while Thrash is a work of fiction, it’s surprisingly grounded in reality…

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Thrash is now streaming on Netflix.

Authors

Patrick CremonaSenior Film Writer

Patrick Cremona writes about film for TopMob, covering new releases in theaters and on streaming platforms. He’s been with the site since October 2019, and during that time has interviewed many famous actors and reviewed a wide variety of movies.

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2026-04-14 20:04