Florida manatees are showing signs of improvement in the third winter of what state wildlife officials are calling an unusual mortality event.

Labor Day weekend and hurricanes. (WKMG)Below is a look back at hurricane history around the Labor Day holiday in Florida:Labor Day Hurricane of 1935One of the strongest hurricanes to ever make landfall in U.S. history was the Labor Day Hurricane of 1935. Great Labor Day Hurricane (1935) -- The country's first Category 5 storm of the 20th century, the Great Labor Day Hurricane killed 408 people in Florida, Georgia and the Carolinas. This Category 4 monster sent many Floridians north for the Labor Day holiday weekend. Tropical Storm force winds extended out up to 400 miles from the center.