Scientists say we need a new category for hurricanes because climate change is causing more powerful storms. The scientists want to add a category 6 to the current 1 to 5 scale used to measure hurricanes. A category 5 measures winds of up to 252 kph. The scientists say a new category of 6 measures winds of over 309 kph. They say that in the past 10 years, there have been five hurricanes and typhoons that would be a category 6.

A scientist said he wants more discussions, "about how to better communicate risk in a warming world". He said greenhouse gasses are increasing temperatures and heating oceans. This gives the water extra energy, which makes hurricanes more powerful. Wind speeds are much higher. The scientist thinks there will be more "super-storms" in the future. He said: "These storms keep getting stronger as the climate changes."