In the year 2005 when the USA population reached 300 million, there was a 'maximum' of hurricane activity and volatility.

The number of Killer Tornadoes in the year 2005 were 13 in the USA.

It was the 'Katrina' year. There were 31 named storms, three were Cat 5, two were Cat 4 and two were Cat 3. In 2005, there was still enough water vapor content at Earth's surface to 'handle the heat.' Earth's physics 'loaded' the troposphere with hurricane spawning capacity and the heat from Human Induced Global Warming was driven into the oceans.