Harvey is actually in a marginally cooler climate than the Arctic Ocean right now.

Fig. 1.3. Geopotential height (850 mb) (click here) from January-March 2016. The normally continuous tropospheric polar vortex of low heights (purple shading) over the central Arctic was split in two parts in winter 2016, giving rise to southerly winds and extreme record temperatures over the central Arctic.

Kindly note while there were frigid winters of 2016 in the lower latitudes, there were areas that were matching the temperatures in the Arctic Ocean at the same time. There is no movement of heat transfer to the Arctic because there is no physics to take it there.

The red line in the graph to the right is the global temperature. The blue line is the temperature of the Arctic Ocean between 60N latitude and 90N latitude. There is every reason to believe the temperatures, especially the summer. are becoming homogenous.

Harvey is taking on heat, dissipating it throughout its water vapor system and siphoning water vapor off the ITCZ to maintain its velocity.