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.
Hottest States in America. Throughout the year, the hottest states in the US are concentrated in the south-central region and southeastern corner of the country. During every season, Florida, Louisiana and Texas are consistently among the top four of the nation's hottest states, based on state-wide average temperatures.