We have had many climate discussions. The Urban Heat Island effect (UHI) is enormous if not taken account of. Most of the observation stations in the US are placed in such a way as to magnify the heatng effect by being at airports for the cities. Here are the Texas results of population growth and heat trends.-http://wattsupwiththat.com/2012/06/28/the-uhis-of-texas-are-upon-you/#more-66378