Executive summary
An extraordinary heatwave affecting Central Asia in March 2025 brought temperatures far above seasonal norms, with some locations experiencing anomalies of up to 10 °C. World Weather Attribution analysis finds that human-caused climate change made the heatwave significantly hotter and more likely. The event demonstrates how warming is increasing the risk of extreme heat outside traditional summer periods, with serious implications for agriculture, water management and public health.
What happened
In March 2025, large parts of Central Asia experienced an unusually early and intense heatwave. Temperatures rose to levels more typical of late spring or summer, persisting for several days across countries including Kazakhstan, Uzbekistan and neighbouring regions.
The early-season heat affected crops emerging from winter dormancy, increased water demand and stressed energy systems. Because the heat occurred outside the usual heat-risk period, preparedness measures were limited and impacts were amplified.
What the attribution analysis found
World Weather Attribution finds that climate change substantially increased both the likelihood and intensity of the March heatwave. Rising global temperatures shifted the baseline climate, making extreme heat events more probable even during traditionally cooler months.
The analysis shows that the temperatures observed would have been extremely unlikely in a pre-industrial climate. Human-induced warming raised peak temperatures by several degrees, contributing directly to the severity of impacts.
Confidence in the attribution is high, as temperature extremes respond strongly and directly to global warming.
Impacts of early-season extreme heat
A key finding of the study is that early-season heat can be particularly damaging. Crops, infrastructure and water systems are often less prepared for extreme heat in spring, increasing sensitivity to temperature shocks.
The heatwave also highlighted risks to human health, as populations had not yet adapted behaviours or protective measures typically associated with peak summer heat.
How climate attribution fits into heat risk reporting
Climate attribution demonstrates that climate change is expanding the temporal window of extreme heat risk. By showing that warming increases the likelihood of heatwaves outside traditional seasons, attribution challenges assumptions embedded in agricultural planning, energy demand forecasting and health preparedness.
Why this matters for organisations
For governments, agribusinesses, utilities and insurers in Central Asia, the findings underline emerging risks from early-season heat. Crop losses, water shortages and energy system stress are likely to increase as warming continues.
How to use this in your own risk work
Organisations should incorporate climate-adjusted heat scenarios across the full calendar year, reassess crop and water management strategies and update heat-health preparedness to account for off-season extremes. Planning for heat should no longer be limited to summer months.
Source
World Weather Attribution (2025). Extraordinary March heatwave in Central Asia up to 10 °C hotter in a warming climate.