Ranked: The Deadliest Types of Extreme Weather Worldwide

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Ranked: The Deadliest Types of Extreme Weather Worldwide

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Key Takeaways

• Heat is a silent killer, responsible for 278,395 fatalities globally but the lowest level of economic loss.
• Storms followed closely with 274,750 fatalities and a much larger economic footprint.

Extreme weather has caused more than 832,000 deaths worldwide since 1995, along with trillions in economic damage. But the human toll varies widely by hazard.

This visualization compares the deadliest types of extreme weather worldwide from 1995 to 2024, based on data from Germanwatch’s Climate Risk Index 2026, revealing how fatalities and economic losses differ across hazards.

Heat Waves Are the Deadliest Weather Hazard

More than 832,000 people died due to extreme weather events from 1995 to 2024, which also caused $4.5 trillion in direct economic damage — almost as much as the UK’s GDP.

Below, we show how different extreme weather events stack up. The data reveals a clear divide between events that cause the most fatalities and those that drive the greatest economic losses.

*Other includes cold waves, severe winter conditions, mass movement, glacier lake outburst floods.

Heatwaves were the deadliest type of extreme weather events, accounting for 278,395 global fatalities. Heat can exacerbate existing health conditions, while heat stroke can be life-threatening.

However, it had the lowest economic loss at $32.9 billion, highlighting that it can be a silent killer without a trail of destruction behind it like other extreme weather events.

Some of the deadliest heatwaves took place in typically mild regions. In 2022, over 60,000 people died in Europe amid extreme heat, while 56,000 people perished in a 2010 Russian heatwave.

Storms followed closely with 274,750 fatalities; they also racked up the largest bill, at $2.6 trillion. Some countries are more exposed than others, facing storms and cyclones on a recurring basis.

Myanmar experienced significant losses in 2008 when Cyclone Nargis caused over 138,000 fatalities, while in Honduras Hurricane Mitch caused $7 billion worth of damage and 14,000 deaths. Both countries have high risks of hurricanes and hazards.

Flooding, which includes both flash floods and river floods, was responsible for 205,452 deaths and $1.3 trillion of economic damage.

Drought and wildfires were responsible for 25,283 and 2,791 excess deaths, respectively. They cost countries $287.0 billion and $177.6 billion in direct damage.

Other events, including cold waves, severe winter conditions, mass movement and glacier lake outburst floods, collectively saw 45,611 deaths and resulted in the second-lowest level of economic damage, at $65 billion.

Disproportionate Impact on the Global South

The Climate Risk Index noted that extreme weather events disproportionately impact the Global South; six out of 10 of the most affected countries between 1995 and 2024 were lower-middle-income, per the report.

Such countries are on the frontlines of climate change but have the least economic capacity to adapt to it.

The need to support developing nations has been widely recognized. At COP30 in Brazil, international governments agreed to mobilize $1.3 trillion annually by 2035 for climate action and triple adaptation financing by 2035.

Learn More on the Voronoi App

To learn more about how extreme weather affects the economy, check out this graphic which charts its impact on the U.S.