Tropical Cyclone Hilary - Updates & Information

Updated: 8/18/2023 at 5:59 p.m.

Due to expected heavy rainfall from tropical storm Hilary, Sweetwater Authority expects unplanned water releases, or spills, from Loveland Reservoir in Alpine, CA may occur early next week. These potential unplanned water releases, together with expected abundant storm runoff, could cause flooding in areas downstream. 

Rain is expected to begin Saturday, August 19th through Monday, August 21st. However, higher flows in the river will extend beyond the storm as stormwater from the area makes its way through the river. 

The Authority is requesting residents in the impacted area inspect their property, relocate any equipment, material, or livestock in the floodway, and clean all critical culverts as soon as possible. Efforts to clear the river channel and floodway of obstructions will reduce the possibility of property damage. The Authority sent a notification letter to property owners in the affected area earlier today.

The dam at Loveland is structurally sound, and there is no dam safety concern. Overflows of Loveland Reservoir are not uncommon in wet years, with the last unplanned water release at Loveland Dam occurring from late 2011 through early 2012.

Authority staff is working closely with local and state agencies to monitor the situation, and will update the agency’s website at with any additional information as it becomes available. Area residents should also be sure to follow any additional instructions from local authorities, as conditions may change.


Updated: 8/19/23 at 1:52 p.m.

Sweetwater Authority is closely monitoring Tropical Cyclone Hilary. No impacts to drinking water service or quality are anticipated at this time. 

The Authority maintains a ready state of emergency preparedness, and encourages our customers to be prepared as well. For more information and emergency preparedness resources, visit