I think it would make sense for hurricanes to be combatted using shade balls to block the evaporation of the ocean into the storm.
This is just like using DDT against mosquitoes. It sounds like a Nobel winning idea until the consequences make it an igNobel winning idea.
By blocking sunlight over a large area you are also blocking photosynthesis over a large area. The wildlife under the shade will not be thankful.
Also, if you don't tie the whole batch of balls they will just be picked up by the hurricane. If you do tie them, then due to currents, waves and the strong winds over it the whole thing will likely fold upon itself, becoming a deathtrap for fish, turtles and cetaceans.
Hurricanes are made stronger by global warming. The decimation of phytoplankton through shading, which effectively reduces the trapping of carbon in the ocean, goes counter to that.
Theoretically Yes, Practically No
I'd say the theory behind this idea is sound. Lower the water temp and reduce humidity in front of a hurricane, and that will sap it of power over time. However, the sheer scale of hurricanes makes this infeasible to put into practice.
Los Angeles used 96 million shade balls to cover its Las Virgenes Reservoir. That reservoir is less than one mile square. Hurricane Andrew, which wrecked South Florida back in 1992, had tropical-storm force winds (36mph sustained) 90 miles wide, which is notably compact for a cyclone. Tropical Storm Nestor, which is making landfall on the Florida Panhandle as I type, is about 150 miles wide, at least per the NOAA wind map. Hurricane Irma, which hit Florida in 2017, at one point had hurricane-force winds 80 miles wide, with tropical storm-force winds extending well over 200 miles wide.
The LA reservoir had the balls packed several layers deep, so let's say we only need 25 million balls to cover a square mile with one layer. To have an effect on a small hurricane, let's say you'd be looking at a more-or-less circular patch of ocean 100 miles wide. The area of that circle would be pi*50^2 ~= 7,850 square miles, so you'd need upwards of 200 billion shade balls.
The city of LA paid about \$0.33 per ball, so we'd be looking at something like $65.4 billion to buy all of those shade balls. At that point, it actually becomes cheaper to just let the hurricane hit and clean up the mess afterwards.
It's a matter of scale. The shade balls I looked at are 4" in diameter. That means a cubic foot of them contains 27 shade balls. Therefore, 200 billion shade balls (100 sq mile circle) would require about 7.4 billion cubic feet of storage space
A standard 20 ft cargo container has 1150 cubic feet of space. To store all the shade balls, you would need 6.4 million standard cargo containers.
The largest cargo ship in the world is the OOCL Hong Kong, and it can carry 20,000 cargo containers.
So you would need 322 of the world's largest container ships just to carry the shade balls. And you'd have to sail them into stormy seas to deploy them in the region of a hurricane. Hurricane tracks and formation are still fairly unpredictable, so you'd need to spread them over a gigantic area. Then you would need to be able to unload 6.4 million cargo containers worth of shade balls quickly, and get all those slow, lumbering ships out of the hurricane zone.
Picking up the shade balls after they have been transported around for days by wind, waves, and currents would be a global-disaster-sized cleanup job, unless you can come ip with a shade ball that will rapidly decompose in sea water, and 200 billion of them decomposing in water doesn't damage the ecosystem.
It would probably be easier to use deployable sun-shades in space to deprive a hurricane formation region of solar energy. Not that even that is a good idea, but it would be easier than putting the shade on the water.