NEW YORK, July 28, 2026, 05:43 EDT
- Initial surveys identified damage in Menasha consistent with at least EF-2 intensity. Final evaluations may require several days to complete.
- Over 30,000 customers experienced power outages. By Monday evening, authorities had not reported any fatalities or injuries.
- Dow futures gained 0.19%. S&P 500 futures edged down 0.09%, and Nasdaq futures lost 0.69%.
The tornado near Appleton is not expected to have a significant impact on the wider U.S. market on Tuesday. Corporate interruptions are contained to the local area, and a manufacturer anticipates returning to standard production within a day.
The storm hit Menasha around noon Monday, delivering damage rated at least EF-2. That designation means estimated wind speeds of 111 to 135 miles per hour. According to the National Weather Service, it may take multiple days to complete final surveys.
U.S. cash markets were yet to open at the dateline. Reuters cited fresh concerns over AI chips for the Nasdaq’s weaker premarket performance ahead of key earnings reports. The Dow’s rise indicated that no widespread disaster trade was underway.
Equities had a muted response to the Wisconsin damage on Monday. The S&P 500 finished largely unchanged. The Dow was up 0.5%, while the Nasdaq fell 0.2%.
| Listed owner | Monday close and move | Approx. market value | Confirmed Fox Valley exposure |
|---|---|---|---|
| WEC Energy Group NYSE:WEC | $113.82, fell 1.68% | $37.4 billion | We Energies cited widespread electric-system destruction and gas emergencies. |
| Oshkosh Corporation NYSE:OSK | $154.95, off 0.14% | $9.7 billion | Pierce lost power at one site; a parts warehouse had roof damage. |
| Illinois Tool Works NYSE:ITW | $284.82, gained 0.61% | $82.3 billion | Reuters photos revealed major roof destruction at Miller Electric. |
WEC, which owns We Energies among its utilities, has the most evident direct exposure. According to the utility, crews have brought power back to over 44,000 customers across the state. The company forecasts service restoration for 90% of customers impacted by the storm by Tuesday night.
An initial assessment of the scale points to lost electricity sales not being the primary factor affecting profits. In Appleton, over 20,000 We Energies customers lost power. In 2024, Wisconsin households used an average of 645 kilowatt-hours each month.
Residential electricity prices in May 2026 stood at 19.74 cents per kilowatt-hour. Using this rate for 20,000 full-day outages, the estimated total is approximately $85,000. This figure is equivalent to around 0.0025% of WEC’s $3.43 billion in first-quarter revenue.
The figure is meant as an example, not a projection. Real sales will vary based on types of customers, outage duration, set fees and future energy use. Items like repair labor, new poles, power lines, and gas service efforts are likely to have greater impact.
We Energies called the damage in the Fox Valley “catastrophic,” but did not share an initial estimate for repair costs. The length of service outages will be the key WEC-specific metric to watch on Tuesday. We Energies News
Pierce, a subsidiary of Oshkosh, reported a brief power outage at one of its manufacturing sites. Staff members were reassigned to alternative Pierce locations. According to the company, there would be “no impact to parts availability” and production would return to normal on July 28. fireapparatusmagazine.com
Miller Electric is a major brand in ITW’s welding division. The segment reported $1.9 billion in revenue in 2025, with North America accounting for 81% of that total. No information was available on public downtime or financial losses before the dateline.
On Monday, the three affected stocks moved in different directions rather than behaving as a disaster basket. WEC slipped 1.68%, OSK dipped 0.14%, while ITW rose 0.61%. The mixed performance does not point to widespread tornado-related repricing, but does not offer a clear explanation.
The bigger market test still awaits. The S&P 500 started Tuesday following two consecutive weekly losses. The Federal Reserve will make a policy decision on Wednesday, and roughly one-third of companies in the index are set to report earnings this week.
Kristina Hooper, chief market strategist at Man Group LON:EMG, said the market appeared “very frothy.” She characterized investors as “walking on eggshells.” This environment increases the likelihood of sharp reactions to unexpected events, though the turmoil is still contained. Reuters
Risks: The tornado rating is still preliminary, with damage assessments ongoing. Extended outages, unreported damage at factories, interruptions in gas supply or significant insured losses have the potential to amplify the market impact.
