The population was 5,586 at the 2000 census and 5,764 at the 2010 census. Sweetwater is the home of the Craighead Caverns which contains the Lost Sea, the United States' largest underground lake.
2011, The HOTTEST Year for Texas. Tweet. For most of Texas, 2011 is now the hottest year on record while city after city shatter records of 100 degree days. Texas is in a severe drought, only averaging about 1 inch of rain during July, and in many areas things are becoming desperate.
Louisiana, New Mexico, Oklahoma and Texas set the record for the warmest summer in the U.S. The average summer temperature of Oklahoma and Texas was at 86.5 degrees F and 86.8 degrees F, respectively, scientists with the National Oceanic and Atmospheric Administration said.