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.
The majority of Texas is currently experiencing in drought that started in October 2010. Most of the state has been under drought conditions for over three years. State Climatologist John-Nielsen Gammon has warned that Texas could be in the midst of a drought worse than the drought of record in the 1950s. 2011 was the driest year ever for Texas, with an average of only 14.8 inches of rain.