Power Outages in Dewey County, SD
Moreau-Grand Electric Coop Inc publishes only a system-wide total, not county figures. There is no live feed for WAPA-- Western Area Power Administration. In 2025, the average customer here lost power for about 6.7 hours.
Dewey County, SD is served by 2 tracked utilities.
Cite this data
- URL
- https://massoutage.com/south-dakota/dewey-county
- As of
- Not available
- Publisher
- MassOutage
MassOutage, "Power Outages in Dewey County, SD". https://massoutage.com/south-dakota/dewey-county
Moreau-Grand Electric Coop Inc publishes no county-level figures.
No live feed for WAPA-- Western Area Power Administration: outages in itsservice area won't show here.
0.0%of this county's ~9,812 customers are served by utilities with a county-level live feed.
We can't see outages for: WAPA-- Western Area Power Administration. Their customers are not in any number on this page; check their own outage maps.
System-wide total only, no county split: Moreau-Grand Electric Coop Inc.
| Utility | Feed | Out | Served | % out | Small outages | Incidents | Utility ETR | As of |
|---|---|---|---|---|---|---|---|---|
| Moreau-Grand Electric Coop Inc | Live · total only | not by county | - | - | - | - | - | - |
| WAPA-- Western Area Power Administration | No live feed | can't see | - | - | - | - | - | - |
Electricity-dependent residents
HHS emPOWER · data October 7, 2026Medicare beneficiaries in Dewey Countywho rely on electricity-dependent medical equipment (ventilators, oxygen concentrators, home dialysis, powered wheelchairs, and more). HHS reports counts of 1–10 as “≤11”. Medicare only, so the full at-risk population is larger.
By ZIP code (7)
| ZIP | Power-dependent | Ventilators | O2 concentrators | Home dialysis |
|---|---|---|---|---|
| 57625 | 42 | 0 | 35 | 0 |
| 57661 | ≤11 | 0 | ≤11 | 0 |
| 57657 | ≤11 | 0 | ≤11 | 0 |
| 57656 | ≤11 | 0 | ≤11 | 0 |
| 57652 | ≤11 | 0 | ≤11 | 0 |
| 57636 | ≤11 | 0 | ≤11 | 0 |
| 57633 | ≤11 | 0 | ≤11 | 0 |
Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.
Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for Dewey County or any town and utility in it.
No active NWS alerts for Dewey County right now.
Dewey County has been under 37 National Weather Service alerts recently, most recently a Wind Advisory on October 16, 2026.
- Dense Fog Advisory ×11
- Wind Advisory ×7
- Special Weather Statement ×7
- Severe Thunderstorm Warning ×6
- Freeze Warning ×3
- Flood Watch ×2
Latest Dewey County, SD outage updates
A running log of how this outage has changed, updated automatically as utilities report in.
- RESOLVED
Power restored after 2h 8m
- OUTAGE BEGAN
Outage began: 284 customers out (5.8% of the county)
Hardest-hit cities in Dewey County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Dewey County went about 6.7 hours without power. Peak simultaneous outage on record reached 2,114 customers.
The US EIA reports South Dakota utilities averaged 4.7 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 6.7 hrs.
Worst year here was 2025 (peak 2,114 customers out) · decade average 3.9 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2024 | 79 | 371 | 1.0 |
| 2025 | 125 | 2,114 | 6.7 |
Relatively High winter weather exposure · 3.9 hrs/yr of outages over the last decade.
FEMA rates this county’s social vulnerability very high: outages hit harder where communities are less able to respond and recover.
All hazard rankings →Power outages in Dewey County: FAQ
- How often does Dewey County, SD lose power?
- Based on EAGLE-I records, Dewey County, SD logged 125 distinct outage events in 2025, averaging about 6.7 hours without power per customer over the year.
- What was the worst power outage in Dewey County, SD?
- The largest tracked outage peaked at 2,114 customers without power, beginning November 25, 2025 and lasting about 3h 30m.
- Is there a power outage in Dewey County, SD right now?
- No major outage is currently reported for Dewey County, SD. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Dewey County, SD?
- Tracked electric providers include Moreau-Grand Electric Coop Inc.
Outages are tracked at the county level; these ZIP codes fall within Dewey County.
57601, 57625, 57630, 57636, 57652, 57656, 57661
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| WAPA-- Western Area Power Administration | - | No live feed | - |
| Moreau-Grand Electric Coop Inc | - | Live · total only | - |
Data from DOE/ORNL ODIN, DOE EAGLE-I, EIA Form 861 (utility reliability), EIA electricity retail prices and FEMA National Risk Index, every source we read. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of South Dakota customers). Machine-readable data: /api/v1/counties/46041 and /api/v1/counties/46041/history.