Summary of Key Points
June 2026 was the hottest June in Western European history and the second-hottest on a global scale, with sea temperatures reaching record levels (El Niño played a significant role in this). Continuous heatwaves in Europe led to deaths from high temperatures, wildfires, droughts, and decreased river flow, while some areas also experienced floods. Other parts of the world saw similar issues with extreme weather and reduced ice cover at both the North and South Poles. Experts warn that the climate system is accumulating heat, making extreme weather events more frequent in the future, posing greater risks to humans, ecosystems, and economies.
1. Western Europe: Unprecedented Heat in June
The average temperature in Western Europe in June this year was 20.74°C, 3.05°C higher than the 1991-2020 average, directly breaking the record set in 2025. This extreme heat lasted throughout the month, with heatwaves in the second half of the month setting new daily temperature records in several countries.
The immediate impacts were on health: many people suffered from heatstroke and died; ecologically, the already dry soil from May's heatwaves became even drier in June, exacerbating wildfires in the Iberian Peninsula (Spain, Portugal) and southern France. This resulted in widespread forest and crop destruction, forcing residents to evacuate and causing significant agricultural losses.
2. Ocean Temperatures Soar: El Niño Exacerbates the Situation
Sea temperatures in non-polar regions (between 60°N and 60°S) were 0.01°C higher than in June 2024, a historic increase. The main cause is the strengthening of El Niño phenomena in the equatorial Pacific Ocean, which warms the global climate like a “heater.”
The consequences of ocean warming are severe: fisheries suffer as fish migrate to cooler waters, reducing fishermen's incomes; coral reefs bleach and lose their vitality, damaging tourist destinations like the Great Barrier Reef in Australia, which hurts the local tourism industry.
3. Drought in Europe: Affecting Shipping and Agriculture
High temperatures combined with drought have caused river flow levels in Europe to drop below average, particularly in France and Central Europe. This has significant economic impacts:
- Shipping: Important waterways like the Rhine River can carry less cargo (such as coal and grain), increasing transportation costs and potentially disrupting supply chains for factories.
- Agriculture: Lack of water for irrigation leads to reduced crop yields, which may drive up food prices, affecting the cost of basic necessities like bread and pasta.
- Hydropower: Reduced river flow decreases power generation, potentially leading to energy shortages during peak summer demand and higher electricity costs.
4. Global Heatwave: Chain Reactions of Disasters
The heatwave is not limited to Europe:
- Other Regions: Floods in North America have damaged farmland and roads; droughts in the Middle East and Central Asia have caused crop deaths; South America has also experienced severe heat.
- Polar Regions: Arctic sea ice coverage is 5% below average, and Antarctic ice coverage is 8% below average—both levels are the sixth lowest on record. Reduced ice cover will gradually raise sea levels, potentially requiring coastal cities (such as Shanghai and New York) to invest in more seawalls to protect against flooding.
These disasters are interconnected: for example, floods in North America can disrupt supply chains, delaying the delivery of American agricultural products to China; droughts in the Middle East can affect oil production, leading to price fluctuations.
5. The Cost of Climate Change
Experts say that the climate system is accumulating heat, leading to more extreme weather events. This will require significant investments to mitigate the effects:
- Adaptation costs: Building more heat-resistant buildings, planting drought-resistant crops, and improving flood prevention infrastructure all require funding.
- Emission reduction: Reducing the use of fossil fuels and transitioning to renewable energy (solar, wind) requires investment from businesses, such as car manufacturers shifting to electric vehicles.
- Disaster recovery: Unpreparedness can result in massive losses, with wildfires costing billions and floods destroying hundreds of factories, far exceeding the costs of preventive measures.
In short, failing to address climate change now will result in higher costs for disaster relief in the future. It is a critical economic consideration that must be taken seriously.
Conclusion
The extreme weather in June 2026 was not an accident but a direct consequence of global warming. It affects our lives and the global economy, impacting food prices and supply chains. To address this issue, everyone and every country must take action—by driving less, promoting green production, and investing more in climate protection. Otherwise, future heatwaves will be even more challenging to manage.