By Miriam Raftery June 17, 2009 (Washington D.C.)—Recent warming in the Southwestern U.S. including San Diego County has been among the worst in the nation, according to a newly-released federal report begun under the Bush administration and finalized by the Obama administration. Average temperatures here have increased 1.5 degrees during the past 20 years and are projected to soar three to five degrees above the historical baseline by 2050 and up to ten degrees by the end of this century, the report predicts.