Officials inspect flood-warning sensors at San Antonio crossings after failure concerns

Flood sensors are supposed to do one simple job — tell drivers and emergency crews when a low-water crossing is turning dangerous. In Bexar County, that job suddenly looks shakier than people assu(news4sanantonio.com)ears. That pushed county officials and the San Antonio River Authority back into inspection mode just as another round of heavy rain hit the San Antonio area. (news4sanantonio.com) ### What are these sensors, exactly? They’re part of the HALT system — High Water Alert L(sariverauthority.org)s safe, yellow means rising water, and red means the road is closed. Across the region, the River Authority says more than 200 HALT systems help trigger flashing lights, alerts, and road-closure decisions. (bexarflood.org) ### What set off the concern? A News 4 San Antonio investigation reviewed the public map and found multiple inactive sensors scattered across the county. The report said more than a dozen were down, including crossings near Leon Valley, Bandera Road, Helotes, and(news4sanantonio.com) not reported since 2019. (news4sanantonio.com) ### Why is that a big deal? Because these aren’t decorative gadgets. The data helps officials decide when to barricade roads and warn drivers away from rising water. It also feeds the public websites leaders tell residents to check during storms. If a sensor i(bexarflood.org)s and other data, but the whole point of automation is speed. In flash flooding, losing even a few minutes is the difference between a nuisance and a rescue. (news4sanantonio.com) ### Which crossing stands out most? Vicar Drive is the hardest one to read past. That crossing was tied to the June 2025 flash floo(news4sanantonio.com)moved and the roadway itself will also be removed, which tells you officials no longer view that spot as something to patch and trust. (news4sanantonio.com) ### Aren’t bigger upgrades already coming? Yes — but that’s also the catch. Bexar County, the City of San Antonio, and the San Antonio River Authority rolled out a NextGen Flood (news4sanantonio.com)ed upgraded gauges, revised alert thresholds, automated barricades, flashing lights, and better street lighting. (sariverauthority.org) ### So why are old sensors still the story? Because long-term modernization does not fix today’s dead hardware. Turns out the current network is still the front l(news4sanantonio.com) an awkward middle phase — the region knows it needs a smarter system, but residents still depend on the older one right now. (news4sanantonio.com) ### What should drivers take from this? Basically, don’t treat the map like a guarantee. BexarFlood.org remains useful, and the city’s SAFE route tools can help peop(sariverauthority.org)n turn a creek crossing lethal fast, “turn around, don’t drown” is still the real system backup. (bexarflood.org) ### Bottom line The news here isn’t that San Antonio discovered flooding is dangerous. It’s that the warning network meant to buy people time has visible blind spots at exactly the moment the region is spending millions to prevent another deadly miss. (news4sanantonio.com)