New Texas Flood Laws Signed Yesterday: What San Antonio Home Buyers, Sellers and Renters Need to Know

Texas Governor signed two significant flood safety bills into law on September 5, 2025, the day before today, following a special legislative session. Senate Bill 1, named the Heaven's 27 Camp Safety Act, and Senate Bill 3 together represent one of the more consequential steps the state has taken on flood preparedness in recent memory. If you are buying, selling, renting or owning property in the San Antonio area, these laws are worth understanding, because their effects will show up in real estate conversations sooner than you might expect.

Senate Bill 1 requires camps located within FEMA-designated floodplains to have formal emergency plans and backup outside communications systems in place. The law was named in remembrance of the lives lost when flooding struck a camp, and it closes a gap that emergency managers and parents had long identified. For real estate purposes, the immediate takeaway is this: if you own or are considering purchasing property that includes or borders any kind of organized camp facility in a floodplain, new compliance obligations now attach to that land use. Buyers conducting due diligence should ask whether any such facility on or near the property has begun the process of meeting these requirements.

Senate Bill 3 addresses early-warning sirens, directing funding toward installation in flash-flood-prone areas. This is the bill with the most direct and widespread relevance for everyday homeowners and renters across greater San Antonio. Flash flooding is not a fringe risk here. The Balcones Escarpment, which runs through and above the city, is one of the most flash-flood-vulnerable geological features in the entire United States. Communities along the Guadalupe River corridor to the north, neighborhoods near Salado Creek, and low-lying areas throughout Bexar County have all experienced the speed and destructiveness that flash flooding can bring.

For buyers currently shopping in areas like Stone Oak, Helotes, the Leon Valley corridor, or communities in far northwest San Antonio near the 78255 and 78256 ZIP codes, the siren infrastructure funded by SB 3 is relevant context. These areas sit closer to Hill Country terrain where rain events can send water downhill with very little warning time. Knowing that the state is now funding a more robust early-warning network adds a layer of safety infrastructure that should factor into how you think about a neighborhood's long-term livability, not just its price per square foot.

Sellers in flood-adjacent areas may find that buyers ask more pointed questions in the weeks ahead, particularly as news of these new laws circulates. Texas already requires sellers to disclose whether a property has flooded, whether it lies in a floodplain, and whether it has previously received flood-related insurance claims. These disclosures remain the baseline. What changes now is the context around them. Buyers are more informed than ever, and legislation like this tends to sharpen their attention. If you are selling a home near any waterway, drainage corridor or low-elevation area, work with your agent to make sure your disclosures are complete and current before you list.

Renters benefit from SB 3 in a practical, immediate way. Warning sirens do not care whether you own or rent. If you are leasing an apartment or house in a neighborhood identified as flash-flood prone, better early-warning infrastructure could one day be the difference between enough time to move to higher ground and not having that time. Renters in areas near Culebra Road, the Woodlawn Lake neighborhood, communities along Leon Creek, or lower-elevation pockets in the South Side around the 78221 and 78224 ZIP codes should stay aware of where their nearest emergency alerts and shelter options are located, and watch for announcements from the city and Bexar County about siren installations as this funding rolls out.

Existing homeowners who carry flood insurance should not treat these new laws as a reason to drop coverage or reduce it. Sirens and emergency plans reduce risk to life. They do not reduce the risk of water entering your home. FEMA flood maps are updated periodically, and a property's flood zone designation can change. If your home is not currently in a designated floodplain but sits near a creek, drainage easement or historically wet area, the conversation with your insurance agent is still worth having.

School districts throughout Bexar County, including Northside ISD, North East ISD and Judson ISD, serve communities that include flood-vulnerable streets and neighborhoods. Families with children who attend camps or outdoor programs should review how those programs are responding to the requirements now established under SB 1.

These two bills will take time to implement fully, but the direction is clear. Texas is investing in flood safety infrastructure and accountability in a more structured way than it has before. For anyone making a real estate decision in San Antonio right now, that is useful and encouraging context as we move deeper into fall storm season.