Water Damage Restoration in Boise, ID
Boise by the numbers: 15 flood report days from 2016 to 2025, 108 freezing nights a year, 2 federal disaster declarations since 2016. Below: first steps, the records, Idaho insurance rules and costs.
Updated November 2, 2026
First Steps for Water in a Home in Boise
- Burst pipe: shut the main water valve, then open the lowest faucet to drain the lines (burst pipe steps).
- Stay clear of wet outlets and cords.
- Photograph the damage, then call your insurer.
How Often Boise Floods
The 5 counties of the Boise metro area logged flooding on 15 days from 2016 to 2025 (28 NOAA reports), June most often.
At the Boise Air Terminal gauge, December is the wettest month with 1.5 inches on average.
| Month | Flood report days | Normal precipitation (in) |
|---|---|---|
| January | 0 | 1.4 |
| February | 1 | 1 |
| March | 2 | 1.3 |
| April | 3 | 1.2 |
| May | 2 | 1.5 |
| June | 4 | 0.8 |
| July | 0 | 0.2 |
| August | 3 | 0.2 |
| September | 0 | 0.4 |
| October | 0 | 0.8 |
| November | 0 | 1.2 |
| December | 0 | 1.5 |
| County | Flood report days | Reports |
|---|---|---|
| Ada County | 10 | 11 |
| Boise County | 5 | 6 |
| Canyon County | 5 | 6 |
| Gem County | 3 | 3 |
| Owyhee County | 2 | 2 |
Freezing Nights in Boise
Boise averages 108 nights a year at or below 32°F (Boise Air Terminal station). About 23 of them drop to 20°F or colder. NOAA counted 64 winter storm, ice or extreme cold days in the 5 counties of the Boise metro area from 2016 to 2025.
Unheated crawl spaces, attics and garages freeze first (Red Cross); keep the heat at 55°F or more (IBHS).
Storms and Disasters in Boise
The 5 counties of the Boise metro area were named in 2 federal weather or fire declarations since 2016 (OpenFEMA).
Notable NOAA storm reports
- June 26, 2026: Flash flood (Canyon County)Timing estimated by MRMS, polygon focused on the area with the largest impact and intentionally kept broad.
- May 27, 2023: Tornado, EF0 (Owyhee County)Photos on social media showed a land spout near Grandview. Reports state at least 3 of them formed in the same area, lasting around 5 minutes each.
- September 5, 2019: Thunderstorm wind, 81 mph gust (Ada County)Numerous trees were knocked down during a microburst from Broadway Avenue to Apple Street, especially near Timberline High School, in Southeast Boise.
- May 25, 2018: Hail, 2 inch hail (Canyon County)Trained spotters south of Caldwell reported lime and half dollar sized hail.
- May 1, 2017: Flood (Ada County)The Boise River remained in flood during the entire month of May due to planned release from Lucky Peak dam.
Federal disaster declarations
- August 19, 2022: Four Corners FireFire, FEMA FM-5449
- October 7, 2017: FloodingFlood, FEMA DR-4342
Boise Housing at a Glance
Census figures for the city of Boise (American Community Survey, 2020 to 2024): 106,279 housing units, a median build year of 1986, 42% built before 1980, 25% before 1970, 63% owner occupied.
Idaho Insurance Rules for Water Claims
Idaho lists failing to acknowledge and act reasonably promptly on claim communications as an unfair claim settlement practice (Idaho Code 41-1329).
Claim problems in Idaho go to the Idaho Department of Insurance.
Flood damage needs a separate flood policy, which typically starts 30 days after purchase (FloodSmart). Look up Boise flood zones on FEMA's flood maps.
Restoration Cost Guide for Boise
| Typical range (national) | Cost |
|---|---|
| Most jobs | $1,305 to $5,707 |
| Sewage, per sq ft | $7 to $7.50 |
| Average insurer payout, water or freeze claim | $15,400 |
Sources: Bob Vila, May 2023; III, 2019 to 2023.
Areas Served Around Boise
The same 24/7 line covers the Boise metro area, including:
- Boise
- Meridian
- Nampa
- Caldwell
- Eagle
- Kuna
Questions
When is the first freeze in Boise?
The median first night at or below 32°F is October 21 and the median last is April 24 at the Boise Air Terminal station (NOAA normals, 1991 to 2020).
How fast does mold start?
Dry wet materials within 24 to 48 hours (EPA).
Sources: NOAA Storm Events, NOAA normals, OpenFEMA, Census ACS, Idaho Code 41-1329, EPA mold guide.