When will the power be back in Diamond Bar, CA?
| Utility information | Our restoration forecast |
|---|---|
| Official ETA, when the utility posts one | Independent estimated return window when trend data allows — often available first |
| Utility-reported status & customer counts | Confidence range + whether the outage is growing, stable, or restoring |
How the forecast works: we analyze how quickly customers are being restored, whether the outage is still growing, current weather, outage size, and similar past outages in this area. Every completed forecast is compared with when power actually returned. As of Aug 19, 7,878 completed outages have been graded this way — median error 2 hours across the most recent 600 of them (about 1.9 days), and we publish the misses. See the full record (how it works). Independent and unofficial: never the utility's commitment.
Track current power outages in Diamond Bar, California — customers reported out, restoration progress, active weather alerts, and an independent restoration estimate. Diamond Bar is a city in Los Angeles County; when the serving utility's public feed reports Diamond Bar directly, this page shows the city's own outage count and restoration time, with the county-wide view as context.
Diamond Bar is a city of about 52,292 residents in Los Angeles County.
None of the utility outage maps we follow has yet listed an outage for Diamond Bar by name, so this page reports the Los Angeles County county-wide view, which covers Diamond Bar. If a serving utility does name Diamond Bar during an outage, the city's own numbers appear here automatically.
ZIP codes in Diamond Bar: 91765 Checking a ZIP goes straight to the address-level view for that area.
Around Diamond Bar: the closest other places we track are Walnut, about 3 miles to the northwest; Pomona, about 5 miles to the northeast; Brea, about 6 miles to the southwest; Chino Hills, about 6 miles to the southeast. Also nearby: West Covina (7 mi NW), Covina (7 mi NW), San Dimas (8 mi N), Yorba Linda (8 mi S), La Puente (8 mi W), Montclair (8 mi NE), Placentia (8 mi S), Chino (9 mi E). Looking further out, the nearest place we track is: north toward La Verne (9 mi); northeast toward Claremont (10 mi); east toward Ontario (12 mi); southeast toward Corona (17 mi); south toward Anaheim (11 mi); southwest toward La Habra (9 mi); west toward Whittier (12 mi); northwest toward Baldwin Park (11 mi).
Who serves Diamond Bar?
We track live outage data from Glendale Water & Power, LADWP, Southern California Edison in Los Angeles County — but several utilities can serve one county, so confirm your own by searching your address on the live map. See the forecast panel above for how the estimate works — its inputs, its independence from the utility, and how every completed forecast is scored against what actually happened. Outages below 5 customers are too small for a meaningful area-wide estimate — the page says so instead of guessing.
Diamond Bar's last tracked outage began Aug 16, peaked at 135 customers out, and was restored in 3 hours. Across the 2 outages tracked here, the typical (median) restoration ran 2 hours.
- Aug 16 — 135 customers out, restored in 3 hours
- Aug 14 — 36 customers out, restored in 50 minutes
Common questions
When will my power be back on in Diamond Bar, CA?
It depends on the cause and how many crews are working. When's the Power Back? combines the live outage count, the current restoration rate, weather, and local history into an independent estimate for the Diamond Bar area — shown even before your utility posts an official restoration time. Check the live power outage status at the top of this page. For context from Diamond Bar's own record: across the 2 outages this site has tracked here, the typical (median) restoration ran 2 hours — the outage-history panel above lists them.
How do I check the power outage status in Diamond Bar, CA?
This page is a live power outage status check for the Diamond Bar area: current customers out, the affected areas on the map, and an independent restoration forecast when enough trend data is available, refreshed about every 15 minutes from utilities' own outage maps and the federal government's county outage data. To narrow it to your own street, search a Diamond Bar ZIP code — 91765 — and the map opens on that area. Your utility's own outage map remains the official word for your account.
How do I report a power outage in Diamond Bar, CA?
Report it to your electric utility — crews are dispatched from customer reports. Utilities tracked in Los Angeles County include Glendale Water & Power, LADWP, Southern California Edison; confirm your own provider, then use its outage line or website. Reporting a downed line helps crews find the fault faster. In a life-threatening emergency, call 911.
Does this page show Diamond Bar specifically, or the whole county?
Right now, the Los Angeles County county-wide view, which covers Diamond Bar. No utility outage map we follow has yet listed an outage for Diamond Bar by name; utilities here have so far reported only county-wide totals, or used area names we cannot match to Diamond Bar. If that changes during an outage, the city's own count and restoration time appear here automatically. Walnut (3 mi NW) is the closest place we track separately.
How accurate is the restoration estimate?
Every estimate is later graded against when the tracked outage was substantially restored (~90% of customers back), and the track record is published on our accuracy page. Estimates firm up a few hours into an outage once a steady restoration trend appears; very small outages are marked "too small to estimate" rather than guessed.
