Lake level projections
LCRA projections show levels in Lake Travis and Lake Buchanan will continue to fall as temperatures remain hot and water use remains high over the next few months. In June, rainfall totals over most of the Highland Lakes watershed in the Hill Country were 1 to 3 inches below normal, and little water flowed into the lakes.
At 6,275 acre-feet, inflows into the lakes in June were about 4 percent of the historic monthly average. Inflows for April through June 2018 are the third lowest on record for that time period. Inflows are the amount of water flowing into the lakes estimated from measurements at four gauges upstream. (An acre-foot is 325,851 gallons.)
The Highland Lakes were created to manage floods and capture water when it rains to ensure the region has a reliable water supply during dry times. Lakes Travis and Buchanan are water supply reservoirs designed to fluctuate and are not constant-level lakes. LCRA manages lakes Buchanan and Travis under a the state-approved 2015 Water Management Plan to provide water for more than a million people and to industries, businesses, agriculture and the environment in the lower Colorado River basin.