*5.1.4 Hurricanes and rainstorms*

Climate change promotes more dangerous hurricanes and heavier rainstorms due to warmer ocean water temperature (**Figure 5**) [4, 9]. The proportion of Category 4 and 5 hurricanes has increased at a rate of 25–30% per 1.0°C of global warming [9]. Hurricane Katrina (Category 5, New Orleans, USA, 2005) was one of the deadliest hurricanes in recent USA history. The total number of direct or indirect fatalities following hurricane Katrina was 1,833 (reports from state and local officials in five states). The 2019 North Atlantic hurricane season had six hurricanes (including three major hurricanes, e.g., Category 3 or higher).

**Figure 5.** *Climate change promotes more dangerous hurricanes.*
