Eastern coasts are warned of ‘catastrophic’ impacts as 200mph winds and a near 10-metre storm surge unleash the worst ...

What happened: Ranked as the deadliest storm since 1950, Katrina is tied with Hurricane Harvey as the costliest Atlantic hurricane on record, according to the National Hurricane Center.

Hurricane Katrina, for example, was far more devastating in terms of loss of life and infrastructure when it made landfall near New Orleans in 2005, but it was a Category 3 when it did.