SB 2919 strengthens emergency power requirements for end-stage renal disease (ESRD) facilities in Texas. It amends the Health and Safety Code to require these facilities to maintain on-site fuel reserves or battery-powered generators capable of providing at least 72 hours of backup power, an increase from the current 24-hour requirement. Facilities must also ensure adequate potable water supplies and maintain a connection for external water delivery in case of emergency. All facilities must update their emergency contingency plans by December 1, 2025.