Number of recorded disasters up 50-fold since 1970 – OWID

Number of recorded disasters up 50-fold since 1970 – OWID
The number of recorded disasters is up 50-fold since the 1970s, but part of that increase is probably due to improvements in recording them. Nevertheless, the accelerating climate crisis has also added significantly to the total count. / bne IntelliNews
By Hannah Ritchie for Our World in Data June 17, 2025

Tracking the occurrence of natural disasters can save lives by helping countries prepare for future ones, Our World in Data (OWID) reports.

In our work on natural disasters, we visualise data from EM-DAT, the most comprehensive international disaster database. Make a chart of the number of recorded disaster events over time – like the one above – and it looks like the number of disasters rose alarmingly from the 1970s to the millennium. This has led to many media outlets and organisations claiming that the number of disasters has quadrupled over the last 50 years.

However, as EM-DAT itself makes clear, most of this is due to improvements in recording. The Centre for Research on the Epidemiology of Disasters, which builds this database, was not established until 1973, and didn’t start publishing EM-DAT until 1988.

The number of recorded disasters increased due to more focused efforts to obtain globally comprehensive data and improvements in communication technologies, which allowed more events to be included, even in the planet's most remote areas.

EM-DAT suggests that only data from 2000 onwards is relatively complete and comparable. The number of events before 2000 is likely to be underestimated. Note that this data does not tell us anything about the intensity of disasters.

Read my full article, with my colleague Pablo Rosado, on the limitations of disaster databases.

Data

Dismiss