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.
In some years the heat can get quite extreme. Dallas has seen many days of 105-110 degree weather, with an all-time high of 113 degrees. According to NOAA, the Dallas area averages 18 days of 100+ degree weather per year, with the most occurring in August (9.2 days) and July (6.0 days).