Arctic Heatwave Alert: Greenland Ice Melts 17x Faster as Extreme Heat Grips the Arctic

Record-Breaking May Heatwave 

In May 2025, an unprecedented heatwave swept across Greenland and Iceland, with temperatures in Iceland soaring above 26°C, more than 13°C higher than the 1991–2020 average. This extreme event was made 3°C hotter and 40 times more likely by human-caused climate change, according to a World Weather Attribution (WWA) report. 

Greenland’s Ice Sheet in Crisis 

• According to WWA, Greenland’s ice sheet melted 17 times faster than the historic May average. 
• Ice loss from Greenland is one of the largest sources of contemporary sea-level rise. The ice loss from 2009 to 2019 has already locked in at least 27m of sea-level rise no matter how the climate changes in the future. 
• Eastern Greenland saw record highs of 14.3°C, almost 4°C above pre-industrial levels. 

Arctic Amplification & Global Consequences 

• The Arctic is warming at an average rate of 4x faster than the global average. 
• Melting sea ice reveals the darker sea surface, which absorbs more heat and accelerates warming. 
• Heatwaves in the Arctic now pose a global threat: 
• Potential collapse of the Atlantic Meridional Overturning Circulation (AMOC) could cause extreme cold events and significant climatic shifts in northern Europe. 
• Rising sea levels threaten island nations like Tuvalu and Kiribati. 
• Increased risk of extreme weather events globally, from floods to prolonged droughts. 

Dire Impacts on Arctic Communities 

• Inuit communities in Greenland face the breakdown of traditional hunting routes due to unreliable sea ice. 
• Cultural heritage and livelihoods tied to ice are at risk. 
• Thawing grounds and flooding are damaging infrastructure designed for colder conditions. 
• Vulnerable populations, including the elderly and those with health conditions in Iceland, are increasingly at risk of heat- related illnesses. 

Scientists emphasize the rapid phase out of fossil fuels and shift to clean energy sources before more tipping points are crossed. 

““We know exactly what is causing the warming and the melting – the burning of oil, gas and coal. The good news is we can stop extreme heat from getting worse and worse, which means shifting away from fossil fuels,”
—Dr. Friederike Otto, Associate Professor in Climate Science at the Centre for Environmental Policy, Imperial College London. 

What happens in the Arctic doesn’t stay in the Arctic.

Feature image: The melting of the Greenland ice sheet from May 15-21 was about 17 times higher than average for this period. Credit: UN Photo/Mark Garten.  

Read more about Extreme weather events  here. 

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