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The historic and devastating floods in Louisiana are the latest in a series of heavy deluges that some climate scientists warn will become even more common as the world continues to warm.
On Tuesday, the National Oceanic and Atmospheric Administration (Noaa) is set to classify the Louisiana disaster as the eighth flood considered to be a once in every 500-year event to have taken place in the US in little over 12 months.
Since May of last year, dozens of people have been killed and thousands of homes have been swamped with water in extreme events in Oklahoma, Texas, South Carolina, West Virginia and Maryland. Noaa considers these floods extreme because, based on historical rainfall records, they should be expected to occur only once every 500 years.
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