Hurricane Dorian has slammed into the northern Bahamas, one of the strongest storms to make landfall in history. It's also the fifth Category 5 storm to form in the Atlantic in the past four years. Here are some facts about what makes a Category 5 storm and what to expect as climate change supercharges our weather.
- What is a Category 5? -
Scientists rank hurricanes from one to five on what is called the Saffir-Simpson Hurricane Wind Scale. Category 5 storms have sustained winds of at least 157 miles (252 kilometres) per hour.
In addition to devastating winds, Category 5 storms unleash catastrophic storm surge -- tsunami-like flooding -- when they make landfall.
Hurricane Dorian's sustained winds reached 185 miles per hour, tying the top speed at landfall ever recorded in the Atlantic, according to the National Hurricane Center.
Dorian's arrival also makes the past four years the longest consecutive stretch on record with at least one Category 5 storm per year in the Atlantic. The last longest stretch was from 2003 to 2005.
- Storms big and small -
Hurricane Matthew in 2016 was the first Category 5 storm in the Atlantic since 2007.
Other recent Category 5's include Hurricane Irma, which battered the Caribbean and the southern United States in September 2017.
Hurricane Katrina, which killed over 1,800 people across the US Gulf Coast in 2005, was also a Category 5.