1931 Atlantic hurricane season

The 1931 Atlantic hurricane season was an active hurricane season, with a total of 13 storms recorded, which was the most since 1916. However, only three of them intensified into hurricanes and just one reached major hurricane intensity, which is Category 3 or higher on the modern-day Saffir–Simpson scale. Nine of the tropical cyclones were identified in real-time, while evidence of the existence of four other tropical cyclones was uncovered by the Atlantic hurricane reanalysis project in 2012 and added to the Atlantic hurricane database. Additionally, two of the tropical storms were upgraded to hurricane status as part of the reanalysis.

Overall, the first four tropical cyclones left mostly minor impact on land. In early September, the fifth system caused severe flooding in Puerto Rico, leaving considerable damage to sugarcane crops and causing at least 30 deaths. Just days later, the British Honduras hurricane formed in the Caribbean Sea. The most intense tropical cyclone of the season, it peaked as a Category 4 hurricane with maximum sustained winds of 130 mph (215 km/h). Striking British Honduras, now Belize, at peak intensity, the hurricane caused about 2,500 deaths and about $7.5 million (1931 USD) in damage there. It remains the deadliest hurricane in the history of Belize. The next hurricane caused significant damage in Puerto Rico and resulted in at least two fatalities. The remaining six tropical cyclones left little to no impacts on land.