the storm had 7 percent stronger wind speeds than a similar one in a world that has not been warmed by the burning of fossil fuels. They also found the rate of rainfall inside the eyewall of the storm was 16 percent more intense.

They're talking about the [World Weather Attribution rapid analysis] https://www.worldweatherattribution.org/climate-change-enhanced-intensity-of-hurricane-melissa-testing-limits-of-adaptation-in-jamaica-and-eastern-cuba/), which uses peer-reviewed methods.