LaSalle County, IL Tornado Risk & Storm Shelter Cost
LaSalle County, IL: what NOAA's tornado record says
Since 1955, NOAA has logged 66 tornado tracks crossing LaSalle County - one about every 1.2 years, which lands it in our High band. Nationally, LaSalle County ranks at the 94th percentile for tornado frequency. Among 102 Illinois counties in this dataset, LaSalle County ranks 11 for how often a tornado touches down.
LaSalle County's EF4-5 history
LaSalle County has 1 violent (EF4-5) tornado on record. FEMA centers its safe-room case on exactly this strength, not on how often a county gets touched - a hardened room is the difference between a code-built house surviving an EF4-5 or not.
What a storm shelter costs near LaSalle County
For a LaSalle County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Illinois-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
Power loss after a tornado outbreak in Illinois often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
Read this before you rely on it
This is a county-level figure, not a per-address probability. LaSalle County covers about 1,135 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. Pre-radar-era records (before the 1990s) are also documented by NOAA as undercounting weaker tornadoes in sparsely-instrumented areas. LaSalle County has about 108,390 residents.