Well, if we take the past century or so, recorded disasters have really multiplied. An article in Live-Science says that "According to the EM-DAT, the total natural disasters reported each year has been steadily increasing in recent decades, from 78 in 1970 to 348 in 2004."
There are other graphs the I can't really show in a comment why show the recorded disasters increasing on average, as far as records go.
Mind you, I've noticed in their documents that natural disaster 'events', such as earthquakes, tsunamis, hurricanes etc. are only classed as 'disasters' after they inflict a certain amount of damage.
When I tried to look for the 'events' in general, the various articles begin to explain that such events happen all the time, but when they get into the data it turns out that the numbers are increasing.
I've found out that the biggest increase in the past century has been in hydrological catastrophes, such as floods, hurricanes, tsunamis etc. Here's a link to a graph from AccuWeather, you can see the number of catastrophes since the 1950s. The biggest jump is in the hydrological events but geophysical ones have increased too, just not as drastically.
It would certainly be interesting to do an in depth study on this, since finding in depth records seems to be tricky XD
if a tornado crosses an open field it's not a catastrophe.
if that same tornado were to cross down town dallas it would be.
but it's the SAME TWISTER.
WHAT'S different?
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The difference is that people are not harmed. But I personally would consider both cases a catastrophe, since a tornado is a destructive force. Either way, land would be devastated. For me, both are a cause for concern.
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Scientific assessments, including those of the Intergovernmental Panel on Climate Change and the U.S. government’s latest National Climate Assessment, indicate no long-term increases in the frequency or strength of hurricanes in the U.S. Neither has there been an increase in floods, droughts and tornadoes, though heat waves and heavy precipitation have become more common.
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