1) No single weather event is caused by climate change; climate is defined as the sum total of weather, so the effect of a climate change on weather is only detectable in the aggregate statistics.
2) For some types of severe weather, such as tornadoes, the science doesn’t currently allow us to say that global warming is making them worse. So that shouldn’t be stated.
3) Nevertheless, global warming represents a key change operating in background of all weather—there’s more overall heat. This is certain to have a wide array of consequences—like a greater risk of heat waves, and more intense precipitation events–and indeed, some of those are already being detected.
Had humans had been this stupid in the past, we would still be living in caves.