Environmental Risk Report for Lewis County, Idaho
Comprehensive environmental hazard assessment
Coordinates: 46.2367°N, 116.4268°W • FIPS: 16061
Risk Assessment for Lewis County, Idaho
About Lewis County, Idaho
Lewis County is a county in ID known for its semi-arid highland climate with cold winters and warm, dry summers. The mountainous terrain offers stunning landscapes but introduces challenges including wildfire risk, landslides, and extreme winter weather.
Our risk scores for Lewis County are calculated using data from the Federal Emergency Management Agency (FEMA) National Risk Index, the U.S. Geological Survey (USGS) earthquake databases, the Environmental Protection Agency (EPA) AirNow program, and the National Weather Service (NWS) alert system. These federal datasets provide comprehensive coverage of natural and technological hazard exposure.
Notable historical events affecting this area include the 1976 Teton Dam Failure (11 deaths, 80 billion gallons of water released). These events underscore the importance of environmental risk awareness and preparedness for residents and property owners.
Notable Historical Events in Idaho
Understanding Risk Factors for Lewis County
🌊 Flood Risk
Flood risk in Lewis County is assessed using FEMA flood zone data, historical flood events, and proximity to water bodies. Areas near rivers, coastlines, and low-lying regions typically face elevated flood potential. Local topography and drainage infrastructure play a significant role in determining neighborhood-level risk.
🔥 Wildfire Risk
Lewis County is situated in a region with high wildfire potential due to seasonal dry conditions, abundant vegetation, and terrain that can accelerate fire spread. Recent fire seasons have grown longer and more intense due to drought conditions and rising temperatures. Local fire departments and CalFire (or equivalent) maintain constant vigilance during peak fire season.
💨 Air Quality
Air quality monitoring in Lewis County draws from EPA AirNow sensors measuring particulate matter (PM2.5), ozone levels, and other pollutants that affect respiratory health. Seasonal variations and agricultural or industrial activity can influence local air quality.
🏜️ Drought Risk
Lewis County faces recurring drought conditions that strain water supplies, increase wildfire risk, and affect agriculture. Multi-year droughts have become more frequent, with reservoir levels reaching historic lows. Water conservation measures are a permanent part of life in this arid region.
⛰️ Landslide Risk
Lewis County's mountainous terrain creates landslide and debris flow risk, especially during heavy rain events or rapid snowmelt. Steep slopes, unstable soils, and areas burned by wildfire are particularly susceptible to landslides.
Other County Risk Reports in Idaho
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