El Nio phenomenon represents warmer than average sea temperatures around the tropical region of the Eastern Pacific. La Nia is the reverse phase colder than average temperatures. It would be interesting to see if there is any indication that these phases and the occurrence of hurricanes in the Atlantic have any relationship. You can use the historical data since 1950 for analysis available here

https://origin.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/ONI_v5.php