Webb County’s Water Risk Is Real: What 32 Texas Disasters Since 2016 Tell You About Your 72-Hour Supply

Texas has logged 32 federally declared disasters since January 2016, and the breakdown is not what most people picture when they think “Texas emergency.” Twenty of those declarations were fires. Four were floods. Four were hurricanes. The rest split between ice storms, a winter storm, and a biological event. Webb County sits in that fire-and-flood overlap zone in a way that should change how you think about household water storage. In July 2026 alone, a flooding declaration hit the county. Less than two months before that, the Stinky Fire and Hunggate Fire were both named federal disasters within four days of each other. That is not a slow-moving threat pattern. That is a reason to have water on hand before any given Tuesday turns into a crisis. Our Flood Preparedness guide covers the flood half of that overlap in more detail.

This post lays out exactly how to size, store, and treat a 72-hour water supply for a Webb County household, grounded in the actual disaster types that have disrupted this part of Texas, not a generic national template.

Fire is the dominant threat, and fire takes your water with it

When people imagine water emergencies, they usually picture floods. But in Webb County and across Texas, wildfire is the more frequent federal-disaster event. That matters for water planning because fire disrupts supply infrastructure in ways that differ from flooding. Firefighting draws heavily on municipal water pressure. When active suppression operations are running near populated areas, residential pressure can drop or vanish entirely. Smoke and ash can also compromise local reservoirs and open water sources, making stored water the only reliable option for several hours or longer.

The Corner Pocket Fire in March 2026 and the 8 Ball Fire in February 2026 are recent examples of how quickly back-to-back fire events can stack up in this region. If you are in a household near dry brush corridors, and much of Webb County qualifies, the fire scenario for losing tap access is at least as plausible as the flood scenario. Plan for both.

During a nearby wildfire event, weather.gov air quality and wind data become relevant not just for evacuation decisions but because smoke infiltration can affect whether you want to run tap water through an open-air container at all. Check the National Weather Service San Antonio office for Webb County-specific fire weather watches and red flag conditions, which signal the highest fire spread risk days.

Floods hit differently here, and they hit the water system first

Webb County has seen three flooding disaster declarations since mid-2025: the July 2026 flooding event, the severe storms and flooding in July 2025, and the severe storms and flooding in May 2025. Three flood declarations in roughly 14 months is a compressed timeline. The Rio Grande corridor and the low-lying drainage areas around Laredo are vulnerable to flash flooding that develops fast and overwhelms treatment capacity before residents have time to respond.

Floodwater contamination is a specific problem. When stormwater overtops or infiltrates a municipal treatment facility, the resulting tap water may carry bacteria, sediment, fuel residue, and agricultural runoff simultaneously. A boil-water advisory handles the biological risk. It does not handle chemical contamination. That distinction, which FEMA’s water safety guidance makes clearly, is why stored water you filled before the event is safer than any treated-on-the-fly water during the acute phase of a flood.

The July 2025 event was categorized as severe storms with straight-line winds in addition to flooding, the kind of compound event that knocks out power at the same time it compromises water. No power means no pumping at the municipal level, and often no pumping at the residential level either if you are on a well. The 72-hour supply exists precisely for that gap.

How much water to actually store for a Webb County household

The baseline is one gallon per person per day for drinking and minimal hygiene. For 72 hours, that is three gallons per person. Webb County’s summer climate makes that a floor, not a target. Laredo regularly records heat index values above 105°F through July and August. Physical activity in that heat, including the work of managing an evacuation or clearing storm debris, increases fluid needs significantly. Build in at least one additional gallon per person per day during summer months.

A practical household calculation:

• Baseline 72-hour supply: 3 gallons × number of people
• Summer adjustment: Add 1 gallon per person per day (total: 6 gallons per person for 72 hours)
• Pets: Budget separately, roughly 1 quart per 20 pounds of body weight per day for dogs; do not subtract from the human supply
• Medical needs: If anyone in the household requires medication that must be mixed, dialysis supplies, or wound care, add a dedicated medical-use reserve on top of the baseline

For a household of four people with no pets and no medical additions, the summer-adjusted 72-hour target is roughly 24 gallons. That fits in a combination of case-pack bottled water plus two or three five-gallon food-grade jugs, a manageable footprint for most homes.

Storage that holds up in Texas heat

Heat degrades plastic containers over time and accelerates bacterial growth in improperly sealed water. In Webb County, this is not a theoretical concern, a container stored in an uncooled garage through a July heat wave is not the same container you filled in February. Store your water supply in a cool interior space if possible. A closet, interior pantry, or shaded utility room is better than an outdoor shed or attached garage that climbs above 90°F daily.

Use only containers rated for potable water. Mark each container with the fill date. Commercially sealed bottled water carries a manufacturer date and is generally safe until that date when stored correctly. Tap water you fill yourself into clean food-grade containers should be rotated every six months. If you add unscented liquid chlorine bleach at the CDC-recommended rate (8 drops per gallon for clear water, 16 drops for cloudy water), the shelf life extends but rotation is still good practice.

When your stored water runs out: treatment in the field

Seventy-two hours is the planning target, but real events sometimes run longer. Know how to treat water you collect on-site if your reserve runs low.

For biological contamination, the most common concern in a flood advisory, bring water to a full rolling boil for one minute. Let it cool in a covered container before use. Do not boil in open containers where ash or smoke particulates can settle in.

For water that appears murky or carries sediment, typical in post-flood tap water, strain it first through a clean cloth or coffee filter before boiling. Skipping this step means you are boiling suspended debris into your water rather than removing it.

Portable filters marketed for camping and emergency use vary significantly in what they remove. A standard hollow-fiber filter removes bacteria and protozoa but does not remove viruses or dissolved chemicals. In a flooding scenario with potential sewage contamination, a filter alone is not enough, you need either boiling after filtering or a filter rated for viruses (look for NSF/ANSI 58 or tested against EPA virus standards). Keep this distinction in mind before purchasing gear and assuming it covers all scenarios.

Chemical contamination from floodwater, fuel, pesticide runoff, industrial spill, is the scenario where no home treatment method is fully reliable. In that case, follow official guidance from the Webb County Judge’s Office or the Texas Division of Emergency Management and use only your pre-stored safe water or commercially sealed bottles until authorities clear the supply.

FAQ: Webb County water preparedness

Does a wildfire in Webb County actually affect tap water quality?

Yes, in two ways. Active suppression draws on the same distribution pressure your household uses, which can cause drops or outages during large fire operations. After the fire, ash and runoff containing burned vegetation and soil can enter local surface water sources. The 2026 fire cluster. Corner Pocket, 8 Ball, Stinky, and Hunggate fires all within five months, shows how frequently this threat activates locally. Stored water eliminates the decision-making burden during those windows.

Webb County had three flood declarations in about 14 months. Is that normal?

It is consistent with a broader Texas trend. FEMA data shows Texas recorded four flood disaster declarations since 2016 statewide, with Webb County seeing an accelerated share of recent events tied to intense storm cycles along the Rio Grande corridor. Flash flooding in this region develops within hours of heavy rain, faster than most boil-water advisories can be issued and communicated. Having water stored before a storm warning, not after, is the only reliable response to that timeline.

If I have a water filter, do I still need to store water?

Yes. Filters are backup tools, not primary supply. Most portable filters do not remove viruses, and none remove dissolved chemical contamination reliably. During the compound events common to Webb County, simultaneous flooding, power loss, and potential infrastructure damage, a filter requires a water source to draw from, a functional user, and correct maintenance. Pre-stored water removes all those dependencies. Use filters as a secondary layer after your stored supply, not instead of it.

📊 See how this compares nationally in our US Disaster Risk Index 2026, ranking all 50 states by FEMA disaster declarations.