A drought plan is a document mandated by the State of Texas for each Public Water Supply to have on file. It directs the actions that a Public Water Supply takes to try and conserve as much water as possible in the event of a natural drought or man-made emergency. The City's drought plan has been enacted during the last two droughts and has proven effective. These plans are updated every five years and submitted to the State of Texas for approval. The City updated the latest plan in 2018. This plan included several innovations to make it more effective (taking into account lessons learned from the drought of 2011-2015.