In theory, would it be possible to stop a hurricane using dry ice technology? Everybody knows that hurricanes feed on the warm water in its path. What if they were to use the technology to cool the water off? Expensive perhaps, but I think paying for damages are more expensive. I know of a website that belongs to a big dry ice company.

Continental Carbonic

In theory, cooling the water would certainly drain some of the strength from a hurricane, but I'm doubtful that we would even be capable of cooling such a large area of ocean (hurricanes force winds typically cover a 2,000 - 70,000 square mile area with tropical strom winds extndign much further pat that) and cooling the spot it happens to be at one moment won't help if it just keeps moving and hits warmer water.

If we could manage to cool such a large area, we'd still be faced with the question of whether we should
- how would the cooling affect the fish in the water (aside from a purely environmental interest, the gulf is the source of a significant portion of the country's sea food)
- how would the cooling affect ocean currents? The warm water flowing from the Gulf keeps Europe warm. (I know you're not suggesting a permanent cooling of the Gulf, but enough cooling to drain a hurricane would last a while)
- what impact would the sublimed dry ice have (dry ice is just solid CO₂ - gaseous CO₂ is a greenhouse gas that could potentially end up warming the oceans - increasing the strength of hurricanes over time).

You'd also have the heat from the refridgeration machines to make the Dry ice.
The fuel burning to drive the machines etc. A Really vicious circle.
Oct of 2004 Scientific American. had an article
"Controlling Hurricanes" By Ross Martin.
Page 68 Volume 291 #4.
Of the ideas presented the biodegradable oil slick to modify the evaporation rate of the water seemed to make the most sense.. The bad news would be the rough water would break up the slick quite easily.
No Easy answers

Here's an article about using an oil slick as surfactant to inhibit hurricane formation, as mentioned by Peteeo: New Scientist: Oil on Troubled Waters.

New anti-hurricane technology from Slovakia

PCT/SK2006/000003 (WO/2006/085830) A METHOD OF AND A DEVICE FOR THE REDUCTION OF TROPICAL CYCLONES DESTRUCTIVE FORCE
documents - http://www.wipo.int/pctdb/en/wo.jsp?wo=2006085830

THE INVENTION relates to a method of suppressing the tropical cyclones’ destructive force characterised in that the ascendant speed of wind in a tropical cyclone’s eyewall is reduced by sea water pumped on-site from under the sea surface above the sea surface and diffused in the wind at the bottom of such tropical cyclone in/near its eyewall. The invention also describes a facility for the application of said method.

Antihurricane Technology Fund
http://www.ahtfund.org

Fund support development, testing and propaganda of technologies that are capable of avoiding spontaneous catastrophes or decrese them in size, fundraising.

anti-hurricane fund, anti-cyclone fund, anti-typhoon fund, hurricane fund, cyclone fund, typhoon fund, Katrina fund, fundraising

Hurricane active technology prevention
ENERGY FROM HURRICANE VERSUS HURRICANE