PARIS • Imagine a world where storms inundate coastal megacities, entire species become extinct in the blink of an eye and conflicts are fought over dwindling natural resources.
Not so difficult this year, perhaps.
After a year of devastating extreme weather and worldwide unrest over the emergency posed by climate change, topics that used to belong to the realm of science fiction are finding their way into mainstream storytelling.
In 2004, director Roland Emmerich's disaster flick, The Day After Tomorrow, depicted a global weather catastrophe, with coastal areas devoured by the sea amid general meteorological mayhem.
Just 15 years on, scenes from the movie resemble images taken from real-life weather events today.
As climate change makes superstorms, flooding, wildfires and droughts more likely, a new genre is gaining fatalistic fans the world over: "cli-fi".
"It's catching on like wildfire," said American writer and cli-fi aficionado Dan Bloom.
He credited United States President Donald Trump, who has said he will withdraw from the Paris climate deal, with helping promote the genre.
"There are a lot of people who say that climate change is not real," said Bloom. "These people are making the rest of us angry and, as a result, cli-fi is getting more and more power."
Dr Andrew Milner, a professor of comparative literature at Melbourne's Monash University, said cli-fi had yet to break out from science fiction's yoke - most people get into the new genre because they like the old one.
"Both its texts and practitioners - writers, readers, publishers, film directors and fans - relate primarily to the science-fiction tradition," he said. "But it is clear the sub-genre has grown rapidly in recent years."
Global protest movements such as the Youth Strike For Climate and Extinction Rebellion have heightened public awareness of the issue.
For J.R. Burgmann, co-author of Science Fiction And Climate Change: A Sociological Approach, cli-fi films and novels are a logical expression of an increasingly knowledgeable and concerned society.
"This rise is a response to real-world concerns," he said. "And though I would argue that literature has been rather slow to respond to man-made climate change, it certainly appears to be making up for lost time."
And because climate change is a truly global problem, cli-fi has become a worldwide, multilingual phenomenon.
In France, two major television series focusing on dystopian but conceivable futures have received popular and critical acclaim.
The Last Wave tells the story of 10 surfers who go missing in bad weather.
When they return, they cannot remember what happened, but some have strange new powers.
And The Collapse, set in a post-apocalyptic world where fuel is scarce, nuclear sites are threatened and medicine is rationed, debuted two weeks ago.
Recent cli-fi works from around the world include Blackout Island by Icelandic author Sigridur Hagalin Bjornsdottir, a Canadian adaptation of Jean Hegland's novel Into The Forest and Water Knife, by American author Paolo Bacigalupi.
In The History Of Bees, Norwegian author Maja Lunde's 2017 bestseller, humanity is forced to pollinate their crops by hand after pesticides have wiped insects off the face of the Earth.
"People are more and more worried about climate change and authors write about what scares them," Lunde said last year.
HARD TO IGNORE
Novels and films about climate change are nothing new, of course.
English novelist J.G. Ballard's The Burning World (1964) and British author John Brunner's The Sheep Look Up (1972) depicted a world ravaged by environmental damage decades before scientists fully understood man-made climate change.
Even late author John Steinbeck's generational The Grapes Of Wrath (1939) is essentially a tale of the harrowing ordeal undergone by climate migrants from the Oklahoma dust bowl.
But as leading cli-fi author Jean-Marc Ligny explained, greater public awareness and a seemingly unending string of drought, wildfires and heatwaves have made climate a topic that is "hard to ignore".
"Climate change needs stories and readers need them to be told," he said.
"There are figures and statistics, but these don't say anything. Cli-fi makes people more aware of the situation."