Aug. 17 Storms Knocked Out Thousands of KUB Customers — What Your Policy Actually Covers

severe thunderstorm
By All Seasons Insurance Group  ·  August 18, 2026

Monday's storms did not need a tornado name to knock out thousands of Knoxville Utilities Board customers and send water across East Tennessee roads. By 6 p.m. on Aug. 17, KUB reported more than 6,900 customers without power. The largest outages sat in West Knoxville, with more downtown, in South Knoxville, and in rural Knox County. The count dropped below 6,000 by 6:35 p.m. KUB serves more than 229,000 customers; more than 97 percent had power as of 6:15 p.m., according to Knox News. Grainger, Sevier, and Union counties were reporting outages as well.

The insurance question is not whether Monday was “a tornado.” In the local reporting we have — WVLT, WIVK/WOKI, and Knox News — the National Weather Service has not confirmed a tornado for Aug. 17. The question is which peril actually hit your house: wind, rising water, a tree that never reached the roof, or a freezer that sat dark for hours.

What Monday's storms actually did

WVLT's Ansley Graves reported a severe thunderstorm warning for multiple East Tennessee counties, with downed trees, power outages, and flooding already in the mix. Hamblen County EMA said Kingsport, Morristown, Greeneville, Rogersville, Bean Station, Tusculum, Surgoinsville, Russellville, Church Hill, and Mount Carmel were still seeing 60 mph winds, downed trees, and damaged roofs through the evening.

WIVK/WOKI, at 5:36 p.m., said NWS Morristown had issued multiple severe thunderstorm and flash flood warnings covering Knox County and neighbors, including Knoxville, Oak Ridge, Clinton, Maryville, Farragut, Powell, Karns, Bearden, and Sevierville. Forecasters said the strongest storms could produce wind gusts up to 60 mph — trees, roofs, siding, and power lines. Flash flood warnings covered portions of Knox, Anderson, Campbell, Morgan, and Scott counties. Officials flagged I-40 and I-75 and repeated the same rule: never drive through standing water. WIVK noted that no widespread damage reports had been confirmed in the warning information available Monday evening.

Knox News, updated at 6:41 p.m., said a flash flood warning covered Anderson County, central Knox County, east-central Morgan County, and south-central Scott County until 8:15 p.m. NWS said flooding was expected in Knoxville, Oak Ridge, Clinton, Oliver Springs, Halls, Rocky Top, Norris, Powell, Karns, and Bearden, with more storms possible before 11 p.m. Knox News also reported flash flooding likely along I-75 between mile markers 108 and 129 and I-40 between mile markers 379 and 400.

That is a map of where wind and water showed up on the same Monday — not a claim count, and not a dollar-loss figure.

Confirmed Monday snapshot

LossTypical HO-3What you actually need
Wind; tree ON the house; rain through a storm-created openingUsually covered, subject to wind/hail deductibleCheck whether that deductible is a % of dwelling
Flood / groundwater / overflow of creeks and streamsNot coveredNFIP or private flood; typical 30-day NFIP wait
Tree in the yard that did not hit the houseOften owner's debris expenseDebris-removal endorsement, if you have one
Food spoilage from the outageOften not coveredSpoilage endorsement
Sewer / drain / sump backupUsually not on the base formWater-backup endorsement
What Monday's losses typically are on a Tennessee HO-3

Does my homeowners policy cover wind damage from these storms?

Usually yes, on a standard HO-3. The Tennessee Department of Commerce and Insurance's long-standing storm guidance — the same language we have used on recent East Tennessee wind posts — is that damage caused by wind, wind-driven rain, trees, or other falling objects is typically covered under most standard homeowners policies. That includes a tree that lands on the structure, and rain that follows through a storm-created opening.

What surprises people is the deductible, not the coverage grant. Percentage wind/hail deductibles are common in Tennessee. On a $400,000 dwelling, 1 percent is $4,000 out of pocket before the carrier pays a dollar. Two percent is $8,000. A modest shingle job can land entirely inside that number. If rain simply blew in with no storm-created opening, TDCI lists interior water damage without roof or wall damage among the events typically not covered.

Does homeowners insurance cover flood from Monday's flash flood warnings?

No. Flood, groundwater, and overflow of watercourses are not on a standard homeowners policy. TDCI lists damage as the result of a flood among the events typically not covered. Rain through a wind-opened roof is usually a wind claim. Water that came up from a creek, a stream, or runoff that inundated the structure from the ground is flood. Flood coverage is a separate policy — NFIP or private. NFIP new-policy waiting periods are typically 30 days. NFIP's authority currently expires Sept. 30, 2026; we already walked through what that date means for Tennessee owners. Sewer or drain backup is a third bucket — usually an endorsement, not flood and not the base HO-3.

If a tree fell in the yard but missed the house, who pays to remove it?

Often you do. TDCI's standard list: removal of fallen trees is typically not covered if the trees do not land on and damage your home. A tree through the roof is a wind claim. A tree across the driveway, with no structure hit, is frequently the owner's debris expense unless you added extra debris-removal coverage.

Will insurance pay for food that spoiled in the outage?

Often not, unless you bought an endorsement. Food spoilage due to a power outage is on TDCI's typical-not-covered list. More than 6,900 KUB customers were without power at 6 p.m. Monday. That is not automatically a covered loss.

If you had damage Monday, what should you do first?

  • Photograph everything before you move it: roof, siding, tree-fall direction, interior water lines, and any standing water near the foundation.
  • Make reasonable temporary repairs and keep every receipt.
  • Report promptly, and be specific. “Storm damage” is how wind and flood get mashed into one denial.
  • Get your own contractor estimate. Do not sign an assignment of benefits with a door-knocker.
  • An inquiry is not a claim. Under Tennessee Code 56-7-113, an insurer cannot raise your premium or cancel you just because you asked a question.
  • Check the wind/hail deductible on the declarations page before you file a small roof claim you may end up paying yourself.

What should you check before the next 60-mph line?

Monday was a typical East Tennessee August night: 60 mph gusts, flash flood warnings, and a few thousand dark kitchens. Wind and a tree on the house usually belong on the homeowners policy. Flood does not. A tree that missed the house often does not. The groceries in the freezer often do not.

Seasons change. So should your coverage.

If Monday left you staring at a tarp, a wet lower level, or a freezer you are afraid to open, call All Seasons Insurance Group at 865-263-1400. Offices are at 1001 Parkway in Sevierville and 121 Suburban Road in Knoxville. Bring the declarations page. We will tell you which of those perils you actually bought.

Not sure which of Monday's losses your policy actually covers?

Call All Seasons Insurance Group: 865-263-1400

Or request a policy review at asigtn.com/get-a-quote. Seasons change. So should your coverage.

Sources

This article is general information about typical policy language and is not a claim determination, coverage opinion, or legal advice. Coverage depends on the specific policy, endorsements, and facts of the loss.