Henderson Preps for Monsoon Flooding: LiDAR Drones, Swift-Water Training

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Monsoon season is a reminder that flash flooding can develop quickly after intense rainfall—so preparedness starts before storm alerts roll in. Ahead of the next heavy-rain stretch, the City of Henderson is highlighting year-round stormwater readiness work and specialized training for swift-water conditions.

Two parts of that readiness stand out right now: stormwater mapping using “green” LiDAR drones, and Henderson Fire’s monsoon-season rescue practice for fast-moving flood scenarios.

What Henderson is doing with “green” LiDAR drones (stormwater readiness) i

In a July 13, 2026 update, the City of Henderson says its Land Surveying team uses drones equipped with green LiDAR—a tool that can measure the ground even beneath shallow water.

The city says the drones help create detailed 3D maps of washes, detention basins, and other critical areas. City officials say that information helps them understand changing conditions, plan maintenance, and protect infrastructure that keeps stormwater moving safely through the community.

The city also says using drones helps crews work efficiently while minimizing impacts to plants and wildlife in natural areas. And it adds that if residents spot a drone overhead during monsoon preparation, it’s part of mapping and planning—not “storm day” flying.

What Henderson Fire is training for (swift-water and flood rescues) i

On July 7, 2026, the City of Henderson shared details from Henderson Fire’s monsoon training at Cowabunga Bay. The city says firefighters practice swift water rescue techniques in a safe, controlled environment so they can sharpen skills they may need if heavy rain creates dangerous flooding.

Henderson Fire’s Technical Rescue Team includes 30 specially trained firefighters. The city’s description names several rescue types the team trains for, including swift water, confined spaces, high-angle rescues, trench incidents, and assisting at structural collapses.

What to do when you hear “watch” or “warning” (NWS monsoon flash-flood guidance) i

The National Weather Service’s “Monsoon Safety” page lays out the key differences in alert language and what residents should do. In short:

• Watch: potentially life-threatening weather or flooding is possible, or could occur in a matter of hours. The NWS says to pay close attention and check updates frequently.
• Warnings (including Flash Flood Warning): life-threatening conditions are about to occur or have already been reported. The NWS says to take action immediately. For flash flooding, it specifically warns to move to higher ground now, especially if you’re in a low-lying area or near a wash.
• Flood Advisories: heavy rain may cause minor flooding in washes, streams, and typical flood-prone areas; if it becomes life-threatening, it can be upgraded to a Flash Flood Warning.

The NWS also emphasizes several flash-flood safety do’s and don’ts:

• Never drive into a flooded roadway—the water depth is easy to misjudge, and roads can be damaged underneath.
• Never drive around barricades—they’re there because flash flooding is about to take place, is already happening, or the road is unsafe.
• Keep children away from washes and storm drains after any rainfall, even light rain.
• Avoid low-water crossings during heavy rains.
• If you live in a flood-prone area: have an evacuation plan and know where nearby higher ground is safe.

Quick pre-storm checklist for Henderson homes and commutes i

• Before a storm: review your evacuation plan and identify routes that avoid low-water crossings and washes.
• Get set for the home front: if you use them, keep flood-protection materials (like sandbags and plywood) stored and ready for fast deployment.
• During an alert: treat a Flash Flood Warning as immediate-action time—move to higher ground right away.
• For families: make a plan for where kids will be during heavy rain (away from storm drains, washes, and low-lying areas).
• For drivers: if water is on the road, turn around—don’t attempt to “test” flooded streets.

Henderson’s updates are focused on preparedness that happens before storms. On storm days, make sure you’re following Henderson-area alerts and the National Weather Service guidance—and act quickly when warnings are issued.

Sources

• City of Henderson — “Making Waves: Henderson Fire Trains for Monsoon Season” (post dated July 7, 2026)
• National Weather Service (NWS) — “Monsoon Safety” (flash-flood watch/warning and safety actions)

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