What to Do Before, During, and After a Flood
Floods are among the most frequent and devastating natural disasters in South America. From torrential rains in the Amazon to overflowing rivers in the humid Pampas, millions of people are exposed each year. But the good news is that preparation saves lives. In this article, we'll tell you how to prevent, detect early warnings, and evacuate safely.
Flood Prevention: Key Actions
Prevention is the first line of defense. We can't control the rain, but we can reduce the impact. These are the most effective measures:
- Keep drainage systems clean: Canals, sewers, and gutters free of trash and debris allow water to flow.
- Don't build in flood-prone areas: Avoid building near rivers, streams, or floodplains. If you already live there, consider relocating.
- Reinforce infrastructure: Retaining walls, dikes, and temporary barriers (like sandbags) can divert water.
- Plant native vegetation: Trees and grasses absorb water and reduce surface runoff.
- Install early warning systems: Water level sensors and weather stations connected to apps like Contingencias warn you hours in advance.
Early Warnings: How to Interpret Alerts
Weather alerts are your best ally. In South America, hydrometeorological services issue different levels:
- Green alert: No immediate risk, but stay informed.
- Yellow alert: Possible heavy rain or flooding. Review your emergency plan.
- Orange alert: Significant risk. Prepare to evacuate if necessary.
- Red alert: Imminent danger. Evacuate immediately if authorities advise it.
With the Contingencias app, you can receive real-time notifications with risk maps and hourly forecasts. Activate personalized alerts for your location.
Evacuation Plan: Step by Step
When the water rises, every minute counts. Having a family plan prevents panic and saves lives.
Before the Flood
- Identify evacuation routes: Know the highest and safest paths to elevated areas or official shelters.
- Prepare an emergency backpack: Include drinking water (1 liter per person per day), non-perishable food, a flashlight, a battery-powered radio, a first-aid kit, documents in a waterproof bag, and a portable charger.
- Designate a meeting point: A place outside your home where your family can gather if separated.
- Protect your belongings: Move valuables to upper floors or high shelves. Unplug electrical appliances.
During the Flood
- Evacuate as soon as you hear the official alert. Don't wait until the last minute.
- Don't walk or drive through moving water. 15 cm of water can knock a person down; 30 cm can sweep away a vehicle.
- Wear waterproof clothing and sturdy footwear. Bring your emergency backpack.
- Stay calm and follow instructions from Civil Defense or firefighters.
After the Flood
- Don't return home until authorities authorize it. Water may be contaminated or structures damaged.
- Avoid contact with stagnant water: It may contain sewage, chemicals, or dangerous animals.
- Check electrical and gas installations before using them.
- Clean and disinfect everything that got wet to prevent disease.
Real Cases: Lessons from South America
In 2023, floods in southern Brazil affected more than 200 municipalities, leaving dozens dead and thousands displaced. The lack of effective early warnings was cited as a critical factor. In contrast, in the city of Santa Fe, Argentina, after the tragic 2003 flood, a monitoring and alert system was implemented that now allows evacuation with up to 48 hours' notice.
Conclusion: Preparation Is Your Best Insurance
Floods cannot be avoided, but their worst consequences can. With prevention, attention to alerts, and a clear evacuation plan, you can protect your family and home. Download Contingencias to receive real-time alerts and access risk maps in your area. The right information at the right time makes all the difference.