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Science says Hurricane Melissa’s strength fuelled by climate change

The ‘monster storm’ tearing through the Caribbean has been supercharged by abnormally warm sea temperatures caused by human-induced climate change, scientists agree.

Time and time again, scientists and environmental activists have warned that climate change will result in stronger storms and more unpredictable weather patterns. They’ve also warned that the communities least responsible for climate change would likely bear the majority brunt of its consequences.

That truth has become more evident with the arrival of the Atlantic Ocean’s thirteenth major storm of 2025 – and one of the fastest-developing hurricanes ever witnessed – bearing the name Hurricane Melissa.

The catastrophic Category 5 hurricane roared towards the shores of Jamaica on Tuesday 28th of October, bringing with it slashing winds of up to 185 miles per hour and storm surges that flooded residential and coastal areas of the island.

Hurricane Melissa cemented itself in a bleak part of history, being the strongest storm to strike Jamaica since local records began in 1851.

As it trudged slowly away from the island, residents woke up to find their nation in complete devastation, with severe damage to electrical grids, hospitals, schools, and tourist hotspots. The Jamaican government swiftly declared the island a ‘disaster zone’ with most of its 2.8 million people still without electricity.

As of October 29th, Hurricane Melissa has moved on. It made landfall in Haiti on Wednesday, causing the death of 25 people after a river to burst its banks in the southern coastal Haitian town of Petit-Goave, flooding and collapsing dozens of homes.

It then moved on to Cuba as weaker but still substantial Category 3 storm, where hundreds of thousands of residents had evacuated from especially vulnerable areas. Still, around 140,000 people have been cut off from main areas of the island due rising rivers and extreme flooding.

Hurricane Melissa is now heading towards the Bahamas, where it is expected to continue to weaken before moving on to the cooler waters near Bermuda. Lower water temperatures in the Northern Atlantic should cause it to finally break apart, resulting in Melissa losing the worst of its velocity.

While countries situated in the Atlantic Ocean are no strangers to tropical storms and hurricanes, meteorologists and climate scientists say the rapid development of ‘monstrous Melissa’ (as many news and weather broadcasters have coined the event) is a direct indicator of how climate change can cause major weather events to spiral into unprecedented behemoths.

Why warmer oceans lead to stronger storms

Over the last decade, ocean temperatures have been on a steady upward trend of warming. This shouldn’t be so surprising, considering that 90 percent of the planet’s excess heat is absorbed by its oceans.

Although it’s nearly November, temperatures in the Atlantic Ocean have been measured at around 30 degrees Celsius (86 degrees Fahrenheit). Compared to past records, this indicates 2 to 3 degrees Celsius above normal, resulting in compounding latent heat and moisture  – the perfect fuel for storms to gain power.

We don’t need to speculate about how this meteorological phenomenon works. Hurricane Melissa, which saw its wind speeds double in a span of less than 24 hours as it edged closer to land, provides the perfect case study. According to initial reports by the non-profit US organisation Climate Central, ‘The warm waters that fuelled [Hurricane Melissa’s] intensification were 500 to 700 times more likely as a result of climate change.’

Still, scientists warn it’s not just the surface of the ocean that is warm. Akshay Deoras, a meteorologist at the University of Reading, emphasised how the entire ocean is being affected by climate change, stating, ‘The deeper layers of the ocean are also unusually warm, providing a vast reservoir of energy for the storm.’

Though Hurricane Melissa will dissipate in a matter of days, the factors that caused it – warmer oceans and high atmospheric temperatures caused by greenhouse gases from human activities – have no overnight solutions.

The devastation left behind by the storm should only raise the urgency of countries to begin acting more decisively on climate change by increasing funding for sustainable alternatives to fossil fuels, many of which already exist.

In just a few weeks, world leaders will gather for the world’s largest annual climate summit – COP30 in Belem, Brazil – with the aim of doing just that.

After a particularly active year for hurricanes and typhoons, we can only hope that genuine efforts are made to reverse (or at the very least slow) the warming of our planet’s inextricably linked ecosystem.

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