Hurricane Harvey was a natural disaster, but the damage it has caused was made worse by climate change, some of which can certainly be attributed to human activity.IFLScience explains that warmer air holds more moisture than colder air – and eventually, all that moisture will fall out as rain. Sea surface temperatures in the area where Harvey intensified were 1-1.5°C warmer than the “average” temperatures a few decades ago. That means 3-5 percent more moisture in the atmosphere.Following Harvey, there are currently three active “named” storms in the North Atlantic: Irma, Jose and Katia.As climate change worsens, hurricanes will certainly become more powerful.