From StateImpact Texas:
The combined storage of the Highland Lakes is expected to approach its record low – 30 percent full – by the end of this summer. After that, forecasters say, the El Niño weather pattern could bring some relief. But how much rain would it take to get them full again?
The total volume of water in the Highland Lakes, the main reservoir for a million people in and around Austin, fell to its lowest level since 1952 (during Texas’ multi-year drought of record) in September 2013. Water flowing into the Highland Lakes hit record lows – just ten percent the annual average — in 2011, Texas’ driest year on record.
Historically, low levels like the ones we’re seeing now have been corrected by massive rain events.