Why extreme weather deaths are falling globally

A dramatic decline in deaths

Extreme weather events are becoming more frequent and intense due to climate change. Yet, paradoxically, the number of people dying from such events has fallen sharply over the past century.

According to a new analysis by climate scientists, global deaths from extreme weather — including heatwaves, floods, storms, and droughts — have dropped by more than 90% since the 1920s. Adjusted for population growth, the decline is even steeper.

What is driving the change

The main reason is not that the weather is less dangerous. It is that societies have become far better at preparing for and responding to disasters.

Early warning systems now give people hours or even days to evacuate before a cyclone or flood hits. Meteorological agencies in India, for instance, have significantly improved cyclone tracking and issued timely alerts that have saved tens of thousands of lives in recent years.

Better infrastructure also plays a major role. Sturdier buildings, elevated roads, and flood barriers reduce the physical impact of storms and rising waters. In many countries, emergency response teams are now trained and equipped to reach affected areas quickly.

Role of technology and data

Advanced satellite imagery and computer models allow forecasters to predict extreme weather events with greater accuracy. Governments and relief agencies use this data to pre-position supplies and personnel.

Mobile phone networks and mass messaging systems ensure that warnings reach even remote communities. Bangladesh, for example, has built a network of thousands of cyclone shelters and volunteer teams, dramatically cutting cyclone deaths from hundreds of thousands in the 1970s to a few hundred today.

The challenge ahead

Despite this progress, climate change continues to intensify extreme weather. Heatwaves, in particular, remain a growing threat, especially in urban areas and among vulnerable populations like the elderly.

Scientists warn that without continued investment in adaptation and mitigation, the gains made so far could be reversed. Developing nations, which often lack resources for robust warning systems and resilient infrastructure, remain at higher risk.

The encouraging trend of falling death tolls is not a reason for complacency. It shows that proactive measures work — but only if they are sustained and scaled up.

What to watch: Whether governments, especially in the Global South, can accelerate investments in early warning systems and climate-resilient infrastructure before the next big disaster strikes.