The heavy rainfall poses a significant risk of flash flooding, particularly in the Texas Hill Country, a region known for its flood-prone basins. Campers and visitors unfamiliar with the area's rapid flood escalation are especially vulnerable. Road closures have already been reported, and moderate flooding has been observed at the Tres Palacios River southeast of San Antonio. The timing of the storms, which are expected to drop the heaviest rain overnight, increases the danger as residents may be caught off guard while sleeping. The region is still recovering from last year's deadly floods, which claimed over 160 lives.