People try to stay cool on the sweltering streets of Manhattan during a heat wave in July 2025.

When a devastating heat wave, hurricane, flood or wildfire strikes, people often want to know: How much did human-caused climate change influence this event, if at all?

For many years, scientists could answer that question only in general terms. They knew that human-caused climate change was increasing the frequency or intensity of some kinds of extreme weather, but determining its influence on a particular event was much more difficult.

Originally published on theconversation.com, part of the BLOX Digital Content Exchange.

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