Associated Press: Last year, the heat turned on and the weather just got weirder. January 2007 was the warmest first month on record worldwide–1.53 degrees Fahrenheit (0.85 degrees Celsius) above normal. It was the first time since record-keeping began in 1880 that the globe’s average temperature has been so far above the norm for any month of the year. And as 2007 drew to a close, it was also shaping up to be the hottest year on record in the Northern Hemisphere. U.S. weather stations …