The Orange Water and Sewer Authority recently enacted Stage 2 water restrictions, which prohibit commercial car washes from using OWASA water and limit customers' outdoor water use to one day a week.
As of Friday, University Lake was almost 6 feet below full and Cane Creek Reservoir was almost 17 feet below full, with 108 days listed as the estimated water supply remaining.
The last time the lakes were filled to their normal operating water levels was June of 2001.
Lakes Warden Eric Barnhardt said each lake has gained about 20 inches of water in the past week.
"(Cane Creek) was 202 inches down; now it's about 182," he said.
Barnhardt said the rain helped the drought conditions but did not nearly refill the reservoirs.
"It's going to take heavy rain over a short period of time, something like a tropical storm or a hurricane," he said.
Barnhardt offered one example of a sufficient amount of rain, which would be about seven or eight inches in the span of a day or a day and a half.
Water levels are generally low every year at this time, but Barnhardt said this year is by far the worst.