Offshore rigs are shut down during hurricanes. In the Gulf of Mexico hurricanes are increasing because of the increasing number of oil platforms which heat surrainding air with methane, it is estimated that U.S. Gulf of Mexico, oil and gas facilities emit approximately 500000 tons of methane each year, corresponding to a loss of produced gas of 2.9 percent. The increasing number of oil rigs also increase movement of oil tankers which also increases CO2 levels which directly warm water in the zone, warm waters are a key factor for hurricanes to form.