Idaho flood potential is typically dependent on the winter snowpack. As higher elevation snow melts, smaller creeks and streams can overflow even when large rivers do not. This can affect roads or structures. Forecasters can often anticipate where a flood will happen before it occurs. Flash floods, on the other hand, happen in mere minutes and sometimes without any sign of rain. In 2023, above-normal snowpacks in the Great Basin (including eastern Idaho) have increased flooding potential in the long term.

 

When Flash Flooding is Forecasted

When a flash flood is forecasted, first review the Flood Safety Checklist. Flash floods can occur at any time because of a heavy downpour, storm surge, coastal storm, snow, or overflow from a local dam or other waterway. They can quickly become life-threatening, so it’s important to pay attention to any alerts from the National Weather Service about your area: https://www.weather.gov/enterprise/sw-alerts-text-1b

What to Do In a Flood Emergency

If a flood warning turns into a flood emergency, flooding has reached a point where it can cause catastrophic damage. In that situation, you should not travel if you’re in a safe, high-ground location unless your area is being ordered to evacuate. Stay off bridges over water as water can rise and take out bridges without warning. If you are in a car, never attempt to drive through high water even if you think you can make it through. Just one foot of water is enough to lift a car off the ground. If your vehicle gets stuck in moving water, stay inside. If water starts to rise inside, then get out onto the roof.

  • Don’t use electricity in a home that’s flooded or leave it on if you’re evacuating. If water touches live electrical outlets, someone could be electrocuted, or it could cause a fire.
  • Make sure to have a Weather Emergency Kit packed and ready to go ahead of time.
  • Don’t leave valuables or irreplaceable furniture on the lower levels of your house. Bring them upstairs whether you’re evacuating or not.
  • Wear protective clothing if you need to brave the flood at all. Waders or tall rubber rain boots are great if you have them. If you must move any debris, make sure you’re wearing gloves.
  • Your home might be unlivable for a period after a flood. How to get rid of mold and repair your home after a flood: https://twinfallscounty.net/des/flooding/

Understand the alerts you may receive: