High Quality Content by WIKIPEDIA articles! The 1870 Atlantic hurricane season lasted from mid-summer to late-fall. Records show that in 1870 there were eleven cyclones. There was one tropical storm, all the others became hurricanes and two those hurricane became major hurricanes (category 3+). However, due to scarce technology and the fact that only storms that affected land or ships were recorded, the actual total could be higher. Most notably, Hurricane Six caused at least $12 million in damage and around 2,000 fatalities in Cuba and Florida.