666 Atlantic hurricane season

The 666 Atlantic hurricane season was an unusual season. A total of eight tropical storms developed - seven of them reached hurricane intensity, six of them reached major hurricane intensity, and four of them reached category 5 intensity. Although only 8 tropical cyclones developed, most were intense or devastating. Every tropical storm affected land, and caused at least one fatality. No names were used in this season, and storms were numbered.

The strongest and deadliest storm of the season was Hurricane Six which was a powerful category 5 hurricane with 185 mph winds and 889 mbar pressure. It caused an estimated 4,000 fatalities in present-day Mexico.