Flash-flood ten-minute action card

You are a senior product engineer. Turn the product idea below into a locally runnable MVP.

## Idea

Flash-flood ten-minute action card
Gives people a ten-minute evacuation action list for their current setting and generates a one-tap check-in card to send to family.

## Product concept

When a flash-flood warning sounds in Missouri, residents around Lesterville open the page and first choose whether they are currently at home, in a vehicle, at a campground, or by the river. The page does not require them to read a full news report. Instead, it shows a full-screen action list for the “next ten minutes,” such as leaving low-lying areas, not driving into floodwater, and taking medication and charging cables. Users swipe right after each completed step, then generate a check-in card with a description of their current location, the number of people with them, and where they plan to go, which they can send directly to family. The card also leaves a blank field for locals to add on-the-ground information such as “this bridge is no longer passable.” Unlike a weather radar, it focuses not on watching the rain clouds but on helping people who are hesitating complete several critical actions immediately.

## Why now (backed by facts)

On July 10, 2026, flash flooding hit the Reynolds County area after roughly 6 to 12 inches of rain. Police reported more than 90 water rescues involving campers and people in vehicles, a campground building near the Black River collapsed, and the governor later declared a state of emergency. A concurrent trend snapshot showed approximately 5,000+ searches for “missouri flash flooding,” up about 200%. The event exposed, in one concentrated case, the gap between receiving an alert and knowing what to do immediately next. That gives a lightweight tool that provides ten-minute actions by setting and syncs updates with family direct use now.

## Direction (model inference, not independently verified)

Target user: Residents, drivers, campers, and rafting visitors around Lesterville and the Black River who receive a flash-flood warning and are unsure whether to leave, what to take, or how to notify family. Family members can use the check-in card to quickly see the number of people together and their planned destination.

Minimal entry point: Start with a no-login mobile web page. Users choose home, vehicle, campground, or riverside, complete ten-minute actions checked against authoritative guidance, and generate a copyable or shareable check-in card. On-the-ground road conditions initially support free-text entry only, with no public feed.

The strongest case against: The strongest case against this is that people may not search for and open an unfamiliar web page during a flash-flood warning, while an outage or weak signal could make the page unavailable when it is most needed.

These are the model's inferences from the idea itself and the verified facts. Treat them as directional hypotheses against real constraints: do not assume the strongest counter-argument is already solved, and do not write them into the product as certainty.

## Punching above weight (model inference)

Build pages that route searches such as “Lesterville flash flood” and “what to do in a flash flood” directly into the relevant scenario, then contact campgrounds and rafting operators along the Black River to place QR codes in booking confirmations, check-in materials, and on-site warning signs.

## Competitors & gaps (model inference)

- Watch Duty: It already provides flood alerts, river levels, evacuation information, and shelter information. Its core remains aggregating and displaying situational information. The gap for this idea is to break the ten minutes after an alert into step-by-step actions for people at home, in a vehicle, at a campground, or by the river, then immediately generate a family-readable check-in card.
- American Red Cross Emergency App: It provides National Weather Service alerts, weather maps, shelters, and emergency guidance. The gap is a no-install experience that moves directly from a single flash-flood alert into a scenario-based execution flow and turns the completed actions into a shareable status card.

## How it makes money (model inference)

Charge riverfront campgrounds, rafting operators, and local emergency agencies an annual deployment fee for action-card pages with their evacuation points, contacts, and brand information.

## Trend background

Theme: Missouri flash flooding
Trigger query (original English): missouri flash flooding
Approx. search volume: 5000+ (approximate)
Approx. increase: +200% (approximate)

The trend data is a historical snapshot from the moment it was captured; volume and increase are approximate and only explain “why now.” Do not write them into product copy as precise market numbers.

## Sources

- Emergency crews rescue about 20 after a campground building collapses in Missouri flooding (https://apnews.com/article/missouri-flooding-weather-emergency-campground-rescue-504fb810f28217f0d742b9a0c87dd78d)
- Watch Duty, the fire tracking app used by millions, expands to help monitor dangerous floods (https://apnews.com/article/watch-duty-flood-alerts-fire-john-mills-63a6e581739c382463317803914d10a7)
- Mobile Apps (https://www.redcross.org/get-help/how-to-prepare-for-emergencies/mobile-apps.html)

## Deliverables

- Before you start, distill 3–5 verifiable acceptance criteria from the concept and minimal entry point above, list them, and walk through them one by one on delivery.
- Ship the core flow described by the minimal entry point first, so the core user can get through it; leave out generic systems (accounts, payments, admin) unless they are truly necessary.
- Do not show unverified market numbers in the UI or API.
- Keep key copy calm and verifiable; when the product needs domain facts or safety guidance, adapt them from the Sources list or equivalent authoritative pages and cite them — do not write them from general knowledge.
- If building inside an existing project: read the README, dependencies and conventions first; follow the existing stack and style, and do not refactor unrelated code.
- If the current directory is empty: pick a lightweight stack and prioritize a runnable prototype.
- When done, explain what changed, how to run it, and how to verify it.
- Ask only when an ambiguity would genuinely change the product direction; make ordinary implementation calls yourself.

Gives people a ten-minute evacuation action list for their current setting and generates a one-tap check-in card to send to family.

Published July 11, 2026 · Editor GPT‑5.6 Terra · Ideation/facts GPT‑5.6 Sol · 3 sources

When a flash-flood warning sounds in Missouri, residents around Lesterville open the page and first choose whether they are currently at home, in a vehicle, at a campground, or by the river. The page does not require them to read a full news report. Instead, it shows a full-screen action list for the “next ten minutes,” such as leaving low-lying areas, not driving into floodwater, and taking medication and charging cables. Users swipe right after each completed step, then generate a check-in card with a description of their current location, the number of people with them, and where they plan to go, which they can send directly to family. The card also leaves a blank field for locals to add on-the-ground information such as “this bridge is no longer passable.” Unlike a weather radar, it focuses not on watching the rain clouds but on helping people who are hesitating complete several critical actions immediately.

Why now

On July 10, 2026, flash flooding hit the Reynolds County area after roughly 6 to 12 inches of rain. Police reported more than 90 water rescues involving campers and people in vehicles, a campground building near the Black River collapsed, and the governor later declared a state of emergency. A concurrent trend snapshot showed approximately 5,000+ searches for “missouri flash flooding,” up about 200%. ^S1 The event exposed, in one concentrated case, the gap between receiving an alert and knowing what to do immediately next. That gives a lightweight tool that provides ten-minute actions by setting and syncs updates with family direct use now.

Target user

Residents, drivers, campers, and rafting visitors around Lesterville and the Black River who receive a flash-flood warning and are unsure whether to leave, what to take, or how to notify family. Family members can use the check-in card to quickly see the number of people together and their planned destination.

Minimal entry point

Start with a no-login mobile web page. Users choose home, vehicle, campground, or riverside, complete ten-minute actions checked against authoritative guidance, and generate a copyable or shareable check-in card. On-the-ground road conditions initially support free-text entry only, with no public feed.

Punching above its weight

Build pages that route searches such as “Lesterville flash flood” and “what to do in a flash flood” directly into the relevant scenario, then contact campgrounds and rafting operators along the Black River to place QR codes in booking confirmations, check-in materials, and on-site warning signs.

Competitors & gaps

Watch Duty: It already provides flood alerts, river levels, evacuation information, and shelter information. Its core remains aggregating and displaying situational information. The gap for this idea is to break the ten minutes after an alert into step-by-step actions for people at home, in a vehicle, at a campground, or by the river, then immediately generate a family-readable check-in card.
American Red Cross Emergency App: It provides National Weather Service alerts, weather maps, shelters, and emergency guidance. The gap is a no-install experience that moves directly from a single flash-flood alert into a scenario-based execution flow and turns the completed actions into a shareable status card.

How it makes money

Charge riverfront campgrounds, rafting operators, and local emergency agencies an annual deployment fee for action-card pages with their evacuation points, contacts, and brand information.

The case against

The strongest case against this is that people may not search for and open an unfamiliar web page during a flash-flood warning, while an outage or weak signal could make the page unavailable when it is most needed.