Was it this hot in the past? For the last century the earth has been warming up faster then ever and the rate at which this is happening is accelerating faster and faster. A study done by Karl et al., in 1993 show an increase both globally and across North America in the recent decade. He found that the minimum temperature increased greatly over the western half of the continent from 1950 to 1990 by as much as 2 to 3 degrees Celsius in less than a century. The maximum increases were smaller for most part. Environmental Canada, an Canadian organization also found that since 1885 the maximum and the minimum temperature in Canada have been changing at different rates with the minimum rising faster than the maximum.

(7). Karl et al., in 1996 released a study that reveals the increase of temperature along the U.S Golf coast and also shows a ten to twenty percent increase in the central and northern plains.