Hurricanes cool the ocean by moving heat into the upper atmosphere, blocking sunlight, and by mixing up the warm surface layer with colder water underneath. The image below shows the path of Hurricane Danielle superimposed on the UNISYS SST anomaly map for September 1.
The next image shows the same thing with today’s SST anomaly map. Note how she cooled things down by several degrees.
The next image is the same, plus Earl.