deadliest hurricanes on record. Damage was estimated at over $12 million (USD). Hurricane Seven On October 7, a ship, the Horatio Harris, reported a hurricane several hundred miles west of the Cape Verde Islands; this appears to be the only known record of the storm. Partagás considered that the system may have been related to the subsequent tropical cyclone over the northern Atlantic, but determined this to be unlikely, given the rapid speed at which it would have needed to travel. Hurricane Eight A hurricane was first detected on October 10, more than 800 miles to the east of Bermuda. Based on reports from several ships, it headed east-northeastward over the following day. Little else is known about its track. Hurricane Nine Second Key West Hurricane of 1870 On October 19 a hurricane was discovered in the Caribbean. The next day it made a landfall in western Cuba as a Category 2 hurricane, causing severe damage in Batabanó and Vuelta Abajo. Later on the 20th, it made landfall in Florida as a Category 1 hurricane. The centre of the hurricane passed over the Dry Tortugas, producing heavy rainfall. It later hit Chokoloskee, crossed the state, and moved out to sea. It eventually dissipated on October 22. Hurricane Nine was responsible for 52 fatalities. Hurricane Ten Several ships north of Cuba and Hispaniola reported a hurricane on October 23 and 24. No further details about this storm are known. Hurricane Eleven The final storm of the season originated from an area of unsettled weather that began affecting ships in the western Caribbean Sea on October 27. It organized into a tropical cyclone several days later, and maritime reports suggest that it achieved minimal hurricane intensity. The hurricane probably curved northward and weakened upon reaching the mountainous terrain of the Yucatán Peninsula. On November 3, a ship encountered the storm at hurricane intensity in the southeastern Gulf of Mexico. See also Lists of hurricanes by area: Bermuda Canada Florida (pre-1900) Tropical cyclone observation Atlantic hurricane reanalysis project References Specific General Atlantic Hurricane Season, 1870 Atlantic hurricane seasons Articles which contain graphical timelines Atlantic