Kerr County, Texas, could again see heavy rain and flooding this weekend, only a week after severe thunderstorms unleashed deadly flash flooding there and in central parts of the state.

The county, where the highest number of deaths occurred in the catastrophic July 4 event, was under a flood watch on Saturday that is in effect until 7 p.m. local time on Sunday.

The watch includes the Hill Country, the southern Edwards Plateau and the Interstate 35 corridor connecting Austin and San Antonio. Up to five million people fall under the watch areas, according to the National Weather Service.

Forecasters said it was difficult to pinpoint where the most intense thunderstorms might break out, but all areas are at risk of getting one to three inches of rain, with some isolated spots getting up to six inches.

“We’re already seeing a few showers along the I-35 corridor,” Eric Platt, a meteorologist with the National Weather Service office that serves Austin and San Antonio, said on Saturday. “It hasn’t quite made it to the Hill Country, but as the day progresses we think we’ll see more coverage of storms.”

The rainfall is not expected to be as extreme as it was on July 4, but with the ground fully saturated from the recent torrential downpours, even small amounts of rain can bring flash flooding, particularly in the Hill Country.