The mayor of New Orleans has called for residents to evacuate unprotected city neighbourhoods as Hurricane Ida bears down on the Louisiana coastline.
"Now is the time," said New Orleans Mayor LaToya Cantrell in a Friday news conference, calling for those living outside the city levee system to flee.
The National Hurricane Center (NHC) says Ida is likely to be an extremely dangerous major hurricane by Sunday.
It has already brought heavy rain and high winds to western Cuba.
The impact of climate change on the frequency of storms is still unclear, but we know that increased sea surface temperatures warm the air above and make more energy available to drive hurricanes, cyclones and typhoons. As a result, they are likely to be more intense with more extreme rainfall.