Yes, several types of natural disasters are becoming more frequent, more intense, or both. But the picture is more complicated than a simple upward trend line. Some disaster types show clear increases backed by decades of data, others are getting worse in severity rather than frequency, and a few trends are partly inflated by improvements in how we detect and record events.
Which Disasters Are Actually Increasing
The clearest signal is in heat extremes. The IPCC rates it as “very likely” that heat waves have become more frequent and intense due to climate change. 2024 was the warmest year in the 175-year observational record, hitting 1.55°C above pre-industrial levels.
Heavy rainfall events are intensifying at high confidence. Warmer air holds more moisture, so when storms do hit, they dump more water. This shows up clearly in flood data: a global analysis of floods from 1985 to 2015 found that flood frequency has risen significantly, with long-duration floods (lasting 21 days or more) increasing the most. In tropical regions, floods have increased fourfold since the 2000s. In the northern midlatitudes, the increase is 2.5-fold.
Droughts are worsening in specific regions. Over the past five years (2018 to 2022), the land area experiencing drought expanded by 74% compared to the 1981 to 2017 average. The year 2022 was a record breaker, with 30% of global land area affected by moderate to extreme drought. More than half of this expansion is driven by increased evaporative demand: warmer temperatures pull more moisture out of soil and vegetation, drying landscapes faster even when rainfall stays the same.
Tropical cyclones tell a split story. The total number of hurricanes and typhoons hasn’t clearly risen, but their intensity has. The proportion of major storms (Category 3 to 5) has grown by about 5% per decade since 1979. In practical terms, a smaller share of storms stay weak, and a larger share reach the destructive end of the scale.
Wildfires: More Extreme, Not More Everywhere
Extreme wildfire activity has more than doubled worldwide. Fire seasons are starting earlier in spring and stretching later into autumn. In parts of the western United States, Mexico, Brazil, and East Africa, fire seasons now run more than a month longer than they did 35 years ago. The fires that do ignite are burning hotter and spreading faster under drier, warmer conditions.
Here’s the counterintuitive part: the total amount of land burned globally each year is actually decreasing, particularly in shrublands, grasslands, and savannas. Much of that decline comes from land conversion in Africa and other tropical regions, where grasslands that once burned regularly have been turned into farms. So the global burned area is shrinking while the most destructive, headline-making fires in forests and near communities are getting worse.
Why Raw Disaster Counts Can Be Misleading
If you look at a chart of recorded natural disasters since the 1970s, you’ll see a dramatic upward curve. Some of that increase is real, but a meaningful portion reflects better record-keeping. The most widely used global disaster database, EM-DAT, was being built during the 1970s and 1980s, exactly when the apparent spike begins. Satellite technology, the internet, and modern communication networks all came online during this window, making it far easier to detect and document events that would have gone unrecorded in earlier decades. A flood in a remote region that no one outside the area knew about in 1965 would be captured by satellites and reported globally by 2005.
This doesn’t mean the increases are imaginary. It means that comparing disaster counts from 1970 to today overstates the trend. The most reliable comparisons use data from roughly the mid-1990s onward, when reporting infrastructure was more consistent. Even within that window, the trends in flooding, drought severity, extreme heat, and intense storms hold up.
The Economic Toll Is Growing Fast
Between 1970 and 2000, direct disaster costs averaged $70 to $80 billion per year globally. From 2001 to 2020, that figure climbed to $180 to $200 billion annually. When you factor in cascading effects and ecosystem damage, the United Nations estimates current disaster costs exceed $2.3 trillion per year.
Rising costs don’t only reflect more disasters. More people live in vulnerable areas than ever before, and the value of infrastructure in harm’s way has ballooned. A hurricane striking a heavily developed coastline in 2024 causes far more economic damage than the same storm hitting the same coast in 1980, simply because there’s more to destroy. Still, the combination of more intense events and more exposure is driving losses to levels that strain insurance markets and government budgets.
Fewer Deaths, More People Affected
One trend cuts against the grim narrative: disaster deaths are falling. Average disaster-related mortality dropped 49% between the 2005 to 2014 period and the 2014 to 2023 period, from 1.62 deaths per 100,000 people to 0.82. Early warning systems, better building codes, evacuation planning, and faster emergency response are saving lives even as disasters intensify.
But the number of people affected by disasters, meaning those who lost homes, livelihoods, or access to clean water, rose 71% over the same timeframe. More people are surviving, but more people are also being displaced, losing crops, and facing long recoveries. The gap between declining deaths and rising disruption highlights a core challenge: we’ve gotten better at keeping people alive during disasters, but not at preventing the broader damage disasters leave behind.
What’s Driving the Changes
Climate change is the primary driver behind the intensification of heat waves, heavy rainfall, drought expansion, and stronger tropical cyclones. Warmer oceans feed more energy into storms. Warmer air evaporates more water from soils and carries more moisture before releasing it as rain. These aren’t projections about the future; they’re mechanisms already visible in the data.
Land use plays a significant role too. Deforestation removes the natural sponge that absorbs rainfall, worsening floods. Urban sprawl replaces permeable ground with concrete, concentrating runoff. Fire suppression policies in some regions have allowed fuel to build up in forests for decades, setting the stage for larger wildfires when ignition finally occurs. Climate change and human land management interact in ways that amplify both.
Population growth in hazard-prone areas compounds everything. More people living on floodplains, coastlines, and in wildfire-prone zones means that even a disaster of unchanged intensity affects more lives and costs more money. Separating “disasters are getting worse” from “we’re putting more in their path” is one of the central difficulties in interpreting the data, but both factors are clearly at work.