TL;DR: In September 2026, a severe wind storm with gusts reaching up to 100 kilometres per hour caused major power outages for 62,256 customers across Western Sydney, the Hawkesbury, and the Blue Mountains. Working alongside Canberra’s Evoenergy, Endeavour Energy response crews launched a massive repair campaign, successfully restoring power to 75% of customers by Sunday afternoon and targeting 90% restoration by 10:00 pm that night. Essential safety warnings remain in place regarding low-hanging powerlines and the safe operation of portable generators.
Chronological Account of the Severe Weather Event and Response
The severe weather incident began on the afternoon of Saturday, 5 September 2026, when gale-force winds swept across the Endeavour Energy network. The sheer force of the wind, with gusts measured up to 100 kilometres per hour, rapidly compromised utility infrastructure and trees, leading to immediate power outages.
- Saturday, 5 September 2026, 5:00 pm: As the gale-force winds began to peak, widespread power outages were officially recorded across the Endeavour Energy network. At this early stage of the incident, the utility company identified that the storm was causing severe disruptions, primarily in highly exposed geographic areas.
- Saturday, 5 September 2026, 7:30 pm: With winds still howling, crews prioritised public safety. Before restoration work could safely commence, teams worked under challenging nighttime conditions to locate hazards, isolate downed lines, and make damaged areas safe for the general public and incoming repair teams.
- Sunday, 6 September 2026, 7:00 am: By Sunday morning, the full scale of the storm's impact was revealed. At its peak, the severe wind storm had impacted 62,256 customers. Overnight efforts by dedicated crews resulted in the successful restoration of electricity to 42,864 customers. However, 19,392 customers remained without power. The outages were concentrated across parts of the Hawkesbury, Western Sydney, and the Blue Mountains. More than 250 fault sites, including fallen trees and powerlines, had been identified.
- Sunday, 6 September 2026, 1:00 pm: Progress accelerated as the weather began to settle. Endeavour Energy reported that they had safely restored power to 75% of the total impacted customer base since the storm hit. Emergency response efforts continued to focus on assessing local damage and systematically restoring electricity supply.
- Sunday, 6 September 2026, 4:45 pm: In the late afternoon, Endeavour Energy crews continued their make-safe and repair duties, preparing to work well into the night. Despite the progress, crews faced 356 individual faults and network issues requiring active repair. The company announced an expectation to restore power to approximately 90% of Saturday's impacted customers by 10:00 pm that evening.
Collaborative Relief Efforts with Canberra’s Evoenergy
Managing a widespread natural disaster requires significant coordination and physical resources. To expedite the recovery process, Endeavour Energy received critical mutual aid from interstate partners. Additional utility crews from Canberra's Evoenergy were deployed to the region, providing vital relief and physical support to the local teams.
This collaborative effort allowed Endeavour Energy to scale up its field operations rapidly. The combined workforce tackled the high volume of repairs across Western Sydney, the Hawkesbury, and the Blue Mountains. Endeavour Energy formally thanked Evoenergy and all assisting crews for their tireless support during this intensive and physically demanding network restoration campaign.
Extent of Physical Infrastructure Damage
The gale-force winds caused extensive and widespread physical damage to Endeavour Energy’s electrical distribution network. The combination of sustained wind pressure and falling vegetation led to severe damage, requiring heavy equipment and technical expertise to resolve.
The primary drivers of the outages included:
- Fallen Trees: High-velocity winds uprooted trees and broke large branches, which fell directly onto overhead powerlines and poles.
- Damaged Powerlines: Overhead cables were snapped or pulled down by falling debris, creating immediate electrical hazards and interrupting the loop of power distribution.
- Broken Utility Poles: The physical force of falling trees and strong winds snapped heavy power poles, requiring complete pole replacements before lines could be re-strung.
As of late Sunday afternoon, crews were still managing 356 individual faults and network issues requiring complex repairs. Each site required individual damage assessment, clearing of debris, reconstruction of physical poles and lines, and testing before power could be safely restored to the grid.
Critical Community Safety and Generator Guidelines
In the wake of severe storm damage, community safety is paramount. Endeavour Energy has issued strict guidelines to protect residents from severe electrical hazards and life-threatening situations while repairs are completed.
Downed and Hanging Powerlines
Residents must treat all powerlines as "live" and highly dangerous.
- Always maintain a safe distance of at least 8 metres from any fallen or damaged powerlines.
- Never attempt to drive across fallen powerlines under any circumstances.
- Avoid all direct and indirect contact with wires that are hanging low, laying on the ground, or tangled in fallen trees.
- Immediately report any observed electrical hazards to emergency services or utility contacts.
Portable Generator Safety Protocols
For residents using portable generators to power their homes during prolonged outages, strict operating guidelines must be followed to prevent fatal accidents:
- Exhaust Fume Hazards: Always operate portable generators outdoors in well-ventilated areas, completely away from open windows, doors, or vents. This is critical to prevent deadly carbon monoxide exhaust fumes from entering the home and causing fatal poisoning.
- Switchboard Connection Restrictions: Generators must never be connected directly to household switchboards or wall outlets unless there is an isolation switch installed by a licensed electrician.
- Risk of Backfeeding: Connecting a generator without an isolation switch can cause electricity to flow backward into the utility network. This process, known as backfeeding, sends high-voltage electricity back up powerlines, making isolated parts of the network incredibly dangerous for field crews working to repair the lines, as well as the broader community.
Emergency Contacts and Official Resources
For residents seeking assistance, reporting damage, or tracking restoration progress, the following official emergency and utility channels remain active:
- Life-Threatening Emergencies: Call Emergency Services immediately on 000.
- Emergency Storm Assistance: Call the NSW State Emergency Service (SES) on 132 500 for assistance with fallen trees, structural damage, or flooding.
- Electrical Emergencies and Power Outages: Report downed powerlines, dangerous situations, or localized outages directly to Endeavour Energy on 131 003.
- Media Enquiries: For press updates and official statements, media representatives can contact the communications team at mnews@endeavourenergy.com.au.
Key Takeaways
- Peak Impact: A total of 62,256 customers lost power at the peak of the storm on Saturday, 5 September 2026.
- Restoration Progress: Over 42,000 customers were restored overnight, reaching 75% restoration by Sunday afternoon, with a target of 90% restoration by 10:00 pm Sunday night.
- Geographic Focus: The most severe damage was concentrated in Western Sydney, the Hawkesbury, and the Blue Mountains.
- Resource Mobilisation: Canberra's Evoenergy provided additional crews to assist Endeavour Energy's field staff in repairing 356 individual faults.
- 8-Metre Rule: Members of the public must stay at least 8 metres away from all fallen powerlines and treat them as live and dangerous.
- Generator Isolation: Portable generators must never be connected directly to home switchboards without a licensed electrician installing an isolation switch, preventing hazardous backfeeding.
