The heavy rainfall poses a significant risk of flash flooding, particularly in Uvalde County and areas west of San Antonio. Highways and roads have been closed, and rivers are rising rapidly, threatening nearby communities. In Boerne, the Cibolo Creek has risen 19 feet above its usual level, leading to stranded motorists and ongoing rescues. The hilly terrain in the region increases the vulnerability to flooding. While no deaths or injuries have been reported, the situation remains life-threatening, with officials urging residents to evacuate or seek higher ground.