Hurricane Betsy
| Category 4 major hurricane (SSHWS/NWS) | |
 Hurricane Betsy in the Gulf of Mexico | |
| Formed | August 27, 1965 |
|---|---|
| Dissipated | September 14, 1965 |
| Highest winds | 1-minute sustained: 155 mph (250 km/h) |
| Lowest pressure | 941 mbar (hPa); 27.79 inHg |
| Damage | $1.42 billion (1965 USD) |
| Areas affected | Windward Islands, Bahamas, south Florida and Florida Keys, Louisiana, inland Southern United States |
| Part of the 1965 Atlantic hurricane season | |
Hurricane Betsy was a strong hurricane of the 1965 Atlantic hurricane season which caused a lot of damage in the Bahamas, Florida, and Louisiana. Betsy made its most strongest landfall near the mouth of the Mississippi River, causing major flooding of the waters of Lake Pontchartrain into New Orleans; at the time it was the costliest hurricane in the history of the United States, and, as the first hurricane to cause over a billion dollars in damages, earned the nickname "Billion-Dollar Betsy". It first hit the Lesser Ahtilles then Miami and New Orleans. 75 people died.
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