SYDNEY — Thousands of homes and businesses in the Sydney region remained without power Friday after a severe thunderstorm hammered parts of New South Wales on Thursday night, bringing strong winds, hail and heavy rain that downed trees and damaged electricity infrastructure.

The Australian and Aboriginal flags flew on Sydney Harbour Bridge
AFP / Wendell TEODORO

Ausgrid and Endeavour Energy, the main distributors serving the greater Sydney area, reported more than 11,000 properties without electricity at the peak of the disruptions late Thursday. By early Friday morning, numbers had fallen but several thousand customers were still affected, with restoration efforts continuing throughout the day.

Ausgrid said more than 7,350 customers lost power at one stage, while Endeavour Energy reported around 4,400 affected. As of Friday morning, Ausgrid indicated approximately 5,000 customers remained off supply, with Endeavour down to about 600. Crews worked overnight and into Friday to clear debris and repair lines and poles damaged by fallen trees and storm debris.

The severe weather cell moved through Sydney's northern and western suburbs around 8 p.m. Thursday, according to the Bureau of Meteorology. Residents reported strong gusts, hail up to golf ball size in some areas and intense lightning. The storm also prompted dozens of calls for assistance to emergency services, including reports of fallen trees blocking roads and minor flooding in low-lying areas.

No serious injuries were immediately reported from the storm, but authorities urged residents to stay clear of downed power lines and treat all infrastructure as live. "If you see a fallen power line, stay away and call your distributor or emergency services," a NSW State Emergency Service spokesperson said.

Power outages were scattered but concentrated in suburbs including parts of the Northern Beaches, North Shore, Western Sydney and some areas in the Hunter region. Specific affected localities included Brookvale, where a local oval experienced a power outage during an NRL-related event, highlighting the storm's widespread impact.

Energy distributors advised affected customers to check their outage maps online for estimated restoration times. Many unplanned outages were listed with restoration targets extending into Friday evening or early Saturday, depending on the complexity of repairs. Planned outages for maintenance in other parts of the state continued separately but were not linked to the storm.

The Australian Energy Market Operator (AEMO) reported no widespread system-wide issues or market suspensions tied to the event, unlike a brief market suspension in NSW earlier in March due to a separate technical glitch. Friday's outages appeared localized to distribution networks rather than transmission-level problems.

This latest weather-related disruption comes amid ongoing challenges for Australia's electricity grid. The country has faced repeated power reliability issues in recent months, including coal plant outages, dust-related faults in South Australia and earlier heatwave-driven strains in Victoria and other states.

In January 2026, a record-breaking heatwave in southeast Australia triggered bushfires and left thousands without power, with Victoria seeing peaks of over 100,000 properties affected before gradual restoration. Similar patterns of extreme weather have tested the National Electricity Market, raising questions about infrastructure resilience during the energy transition.

Coal-fired power stations recorded 108 outages over the 2025-26 summer, with 90 unplanned, according to reliability reports. Aging plants like Vales Point in NSW and Callide C in Queensland have experienced multiple failures, contributing to price spikes and reserve concerns.

Longer-term warnings persist around the scheduled closure of the Eraring power station, NSW's largest coal plant, due in 2027. AEMO has flagged potential blackout risks if the facility shuts as planned without sufficient replacement capacity, prompting discussions about possible extensions.

Meanwhile, gas supply disruptions added another layer of complexity. On Thursday, Tropical Cyclone Narelle caused outages at Chevron's Gorgon and Wheatstone LNG facilities off Western Australia, with Woodside's Karratha Gas Plant also reporting a production interruption. These events could tighten domestic gas availability, though direct links to electricity outages on the east coast remain limited.

Government and industry leaders continue pushing reforms to improve reliability. Recent announcements include measures for cheaper daytime solar power and adjustments to the Default Market Offer aimed at shielding households from global energy pressures. Federal Energy Minister Chris Bowen has emphasized the role of renewables and storage in building a more resilient system, though critics point to transitional vulnerabilities.

For residents dealing with Friday's outages, practical advice included using battery backups or generators where safe, preserving refrigerated food and checking on vulnerable neighbors. Distributors offered compensation schemes for prolonged outages in some cases, including Prolonged Power Outage Payments in affected states.

Victoria and Queensland reported only minor, routine outages on Friday, with networks like Powercor, CitiPower and Energex showing small numbers of customers affected by isolated faults rather than major events. South Australia continued monitoring dust-related issues that plagued regional areas earlier in the year but saw no major new storms triggering widespread blackouts.

The Bureau of Meteorology forecast further unstable weather across eastern Australia over the weekend, with possible thunderstorms in NSW and Queensland. Residents were urged to prepare for potential repeat disruptions by securing loose items, monitoring weather apps and having emergency kits ready.

As climate patterns shift, extreme weather events capable of knocking out power are becoming more frequent, experts say. This places greater pressure on network operators to harden infrastructure against storms, fires and heat.

In Sydney, clean-up crews from local councils joined energy workers to clear roads and restore services. Some businesses reported lost trading hours, while households faced inconvenience from lack of lighting, heating or cooling.

Ausgrid and Endeavour Energy updated their outage maps regularly, encouraging customers to report faults through official channels rather than social media for faster response. SMS alerts and apps provided real-time information for many.

The storm's timing, late on a Thursday, affected evening commutes and family routines but avoided peak daytime demand that could have strained the grid further.

Broader energy security remains a national conversation. With coal plants retiring and renewables scaling up, the role of batteries, pumped hydro and gas as backup continues to evolve. Recent market notices from AEMO showed no immediate lack of reserve issues on Friday, offering some reassurance.

For now, the focus in Sydney and surrounding areas is practical restoration. Crews are expected to make significant progress by Friday evening, though some remote or heavily damaged sites may take longer.

Affected residents can check distributor websites — Ausgrid for much of Sydney and the Central Coast, Endeavour Energy for western and southern areas — or call their emergency lines. Safety remains paramount: never approach downed lines, and use caution with candles or generators to avoid carbon monoxide risks.

As Australia navigates its energy transition amid volatile weather, events like Thursday's storm serve as real-world tests of grid resilience. While localized outages are common, minimizing their frequency and duration will be key to maintaining public confidence in the power system.

Friday's situation appeared under control with no escalation to load shedding or broader blackouts, a contrast to some past heatwave or storm events. Ongoing monitoring by AEMO and distributors will determine if further weather impacts emerge over the weekend.