# Greece power and water outages continue amid maintenance

> Live situation record from CLSTR: https://clstr.news/situations/greek-power-grid-maintenance-outages
> Updated: 2026-09-18T04:50:01.000Z. Sources: 60. Developments: 40.

The HEDNO rolling maintenance programme continues to cause scheduled electricity cuts across Greece to facilitate network reinforcement and upgrades. In late August, HEDNO announced further planned outages affecting multiple regions, including parts of Attica, Crete, Phthiotis, Trikala, and Imathia. 

In early September, HEDNO announced additional outages for Crete, including the entire municipality of Platanias and the Gerani area on 6 September. In the Pieria region, the Municipality of Dion-Olympus, specifically the Municipal Community of Dion and western Karitsa, faced scheduled interruptions on 7 and 10 September.

Scheduled outages for 8 September included various areas in Crete—specifically the Heraklion-Moires road, Stavrakia, and parts of Kissamos and Platania—as well as the Exochi community and parts of Chalkidona in Thessaloniki. In Phthiotis, technical works affecting Lamia, Lokroi, and Kamena Vourla were scheduled from 8 to 12 September.

On 10 September, utility disruptions expanded in the Attica region. EYDAP announced water supply interruptions across various areas of Attica to facilitate network repairs and upgrades. Simultaneously, DEDDIE scheduled power outages in several municipalities, including Ano Liosion, Glyfada, Athens, and Kallithea, due to construction works and operational requirements.

On 16 September, HEDNO announced further scheduled power outages for Crete and Attica. In Crete, interruptions were planned for the Heraklion and Chania prefectures, specifically affecting the Municipality of Faistos (Skourvoula), the Municipality of Heraklion (Chersonisos), and parts of the Municipality of Chania and Kantanos-Selino. In Attica, planned interruptions were set for parts of the Alimos municipality, including intersections such as Leivaditi Tasou, Eptanisou, and Maizonos.

On 18 September, HEDNO announced additional scheduled outages for Attica, including parts of Ilioupoli, Glyfada, Athens, and Dafni. These measures are intended to ensure long-term grid reliability through tasks such as replacing worn equipment, cleaning overhead lines, and vegetation management.

## Claims

- DDEDDIE scheduled maintenance and upgrades of the electricity network on 29 July 2026. (corroborated by 3 sources)
- The maintenance caused temporary power outages in several districts of Attica. (corroborated by 3 sources)
- Outage times ranged from 08:00 a.m. to up to 16:00 p.m., varying by location. (corroborated by 3 sources)
- Affected districts include Agios Dimitrios, Kallithea, Nea Ionia, Ilion, Marousi and Tzavelas. (corroborated by 3 sources)
- DDEDDIE warned that cables remain live during the outages and urged the public not to touch them. (corroborated by 3 sources)
- HEDNO has scheduled power outages for maintenance, construction, and network upgrades. (corroborated by 3 sources)
- Planned power outages are scheduled for various regions in Greece due to maintenance, reinforcement, or network upgrade works. (corroborated by 3 sources)
- Planned outages will affect various areas in Attica, including Athens, Piraeus, Lavrio, and Keratea. (corroborated by 2 sources)
- Two seven-hour outages are scheduled in Ano Liosia on NATO and Aspropyrgou Avenues. (single source)
- Power outages are scheduled in Crete, specifically in Heraklion, Chania, and Rethymno. (single source)
- In Crete, outages are scheduled for Heraklion, Chania, Rethymno, and Lasithi on Tuesday, September 8. (single source)
- In Phthiotis, power outages are scheduled for Lamia, Lokroi, and Kamena Vourla between September 8 and September 12. (single source)

## Timeline

### 2026-09-18: Attica scheduled power outages announced by HEDNO

HEDNO has scheduled power outages in several areas of Attica on Friday, September 18, for essential electrical grid maintenance and infrastructure upgrades.

4 sources. https://clstr.news/cluster/attica-scheduled-power-outages-announced-by-hedno

### 2026-09-16: HEDNO announces scheduled power outages in Crete and Attica

HEDNO has scheduled power outages for Wednesday, September 16, in parts of Crete and Attica for grid maintenance and network upgrades.

6 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-in-crete-and-attica

### 2026-09-10: Attica utility services announce water and power outages

Scheduled water and electricity outages will affect various parts of Attica, Greece, on September 10 due to infrastructure maintenance and repairs.

5 sources. https://clstr.news/cluster/attica-utility-services-announce-water-and-power-outages

### 2026-09-07: HEDNO announces scheduled power outages across Greece

HEDNO has announced scheduled power outages across Crete, Phthiotis, and Thessaloniki due to planned maintenance and network upgrades occurring between September 8 and September 12.

5 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-across-greece

### 2026-09-05: HEDNO announces scheduled power outages in Crete and Pieria

HEDNO has scheduled power outages in Crete and the Dion-Olympus region of Greece for maintenance works on September 6, 7, and 10.

8 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-in-crete-and-pieria

### 2026-08-29: HEDNO announces scheduled power outages in Phthiotis and Attica

HEDNO has announced scheduled power outages for network maintenance and upgrades in Phthiotis and several municipalities in Attica, including Athens, Piraeus, and Moschato.

4 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-in-phthiotis-and-attica

### 2026-08-27: Greece utility maintenance causes power and water outages

Scheduled power and water service interruptions are occurring across Greece, including Attica, Crete, and Thessaloniki, due to essential utility maintenance and network upgrades.

8 sources. https://clstr.news/cluster/greece-scheduled-power-outages-announced-for-attica-and-crete

### 2026-08-25: HEDNO announces scheduled power outages in Crete and Thessaloniki

HEDNO has scheduled power outages in Crete and Thessaloniki on August 25 for grid maintenance and network upgrades.

7 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-in-crete-and-thessaloniki

### 2026-08-22: HEDNO announces planned power outages across multiple Greek regions

HEDNO has scheduled widespread planned power outages across Attica, Crete, and other Greek regions for network maintenance. Meanwhile, DEYAL in Lamia is cutting water to consumers with overdue bills.

7 sources. https://clstr.news/cluster/greece-scheduled-power-outages-announced-for-crete-and-phthiotis

### 2026-08-19: HEDNO announces planned power outages in Crete and Attica

HEDNO has announced planned power outages for August 20 across Crete and Attica, Greece, due to scheduled grid maintenance and construction work.

4 sources. https://clstr.news/cluster/hedno-announces-planned-power-outages-in-crete-and-attica

### 2026-08-12: Attica regions face scheduled water and power outages

Scheduled water and electricity outages are set to affect multiple municipalities in the Attica region of Greece on Wednesday, August 12, due to maintenance and construction.

3 sources. https://clstr.news/cluster/attica-regions-face-scheduled-water-and-power-outages

### 2026-08-09: HEDNO announces planned power outages across Attica, Crete, and Thessaloniki

HEDNO has announced planned electricity outages across Attica, Thessaloniki, and Crete due to network maintenance and construction works.

6 sources. https://clstr.news/cluster/hedno-announces-scheduled-power-outages-in-attica-and-thessaloniki

### 2026-08-08: Greece: New song release and power outage updates

Recent reports from Greece include the release of Kostas Vasilakis's new song and scheduled temporary power outages in Karditsa.

2 sources. https://clstr.news/cluster/karditsa-scheduled-for-temporary-power-outages

### 2026-08-05: Attica, Greece faces widespread scheduled power outages on Aug 5‑6, 2026

Scheduled electricity cuts will hit multiple areas of Attica, Greece on Aug 5‑6 2026, lasting up to eight hours for maintenance work.

4 sources. https://clstr.news/cluster/attica-greece-faces-widespread-scheduled-power-outages-on-aug-56-2026

### 2026-08-03: Greek Power Utility DEDDIE Officials Arrested Over Crete Fires

DEDDIE officials in Chania and Rethymno were arrested for alleged involvement in Crete fires; one was released with restrictions, the other detained pending investigation.

4 sources. https://clstr.news/cluster/greek-deddie-chief-arrested-after-crete-power-line-fire

### 2026-08-03: Attica, Greece to experience scheduled power outages on Aug 3, 2026

ΔΕΔΔΗΕ scheduled power outages across Attica on 3 Aug 2026 for maintenance, affecting many neighborhoods and urging residents to limit electricity use.

5 sources. https://clstr.news/cluster/attica-greece-to-experience-scheduled-power-outages-on-aug-3-2026

### 2026-07-31: Greece Schedules Power Outages in Halkidiki and Imathia Regions

Greece will carry out scheduled electricity outages in Halkidiki (1 Aug) and Imathia (2‑5 Aug 2026), affecting homes, businesses and irrigation, with detailed timetables released for each municipality.

6 sources. https://clstr.news/cluster/greece-schedules-power-outages-in-halkidiki-and-imathia-regions

### 2026-07-29: Planned power outage hits multiple districts of Attica, Greece on July 29

DDEDDIE's scheduled maintenance caused temporary power cuts across several Attica districts on July 29 2026, with outages from 8 am to mid‑day; residents were warned to avoid live lines.

7 sources. https://clstr.news/cluster/planned-power-outage-hits-multiple-districts-of-attica-greece-on-july-29

### 2026-07-25: Greece's DEDDIE Schedules Power Outages Across Athens and Attica

DEDICE will cut power in Athens and four Attica municipalities on 25 July for network maintenance, with outages lasting up to 11 hours on specific streets.

8 sources. https://clstr.news/cluster/greeces-deddie-schedules-power-outages-across-athens-and-attica

### 2026-07-24: Planned Power Outage Hits Chania Region of Crete

Crete's electricity provider will cut power in Chania and surrounding districts from 27 July to 1 August 2026 for maintenance, urging safety precautions.

2 sources. https://clstr.news/cluster/planned-power-outage-hits-chania-region-of-crete

### 2026-07-22: Attica hit by thunderstorms and widespread power outages

Thunderstorms in western Attica triggered an orange alert and Red Code, while scheduled and unplanned power cuts across Athens left many districts without electricity, with restoration slated through the night.

7 sources. https://clstr.news/cluster/widespread-power-outages-hit-athens-and-attica-suburbs

### 2026-07-18: Greece schedules widespread power outages on July 19‑20, 2026

DEDDIE will cut electricity in Crete, Attica, Thessaloniki and other Greek areas on July 19‑20, 2026 for scheduled network upgrades and maintenance.

13 sources. https://clstr.news/cluster/greece-schedules-extensive-power-cuts-on-july-19-across-crete-and-thessaloniki

### 2026-07-16: DEHDE schedules electricity cuts in Attica and Thessaloniki

DEHDE announced electricity cuts for 17 July in Attica and 16 July in Thessaloniki, affecting numerous streets and services.

3 sources. https://clstr.news/cluster/dehde-schedules-electricity-cuts-in-attica-and-thessaloniki

### 2026-07-14: Greece plans widespread power outages on July 14‑15 for network upgrades

Greece’s power grid operator DEHDE scheduled temporary electricity cuts on July 14‑15 across multiple regions, including Athens, Crete, and other islands, for maintenance and network upgrades.

3 sources. https://clstr.news/cluster/greece-plans-widespread-power-outages-on-july-1415-for-network-upgrades

### 2026-07-11: Greek electricity provider schedules extensive power cuts across multiple regions July 13‑16

ΔΕΔΔΗΕ plans scheduled power outages across Crete, Athens, Eordaia and Thessaly from 13‑16 July 2026 for maintenance, advising residents to take safety precautions.

4 sources. https://clstr.news/cluster/greeces-dehde-schedules-july-2026-power-cuts-across-attica-and-eordia

### 2026-07-08: Deddie schedules power outages across Attica on July 9‑10, 2026

DEDDIE will cut power in numerous Attica municipalities on July 9‑10 2026 for maintenance, urging residents to stay cautious and expect outages from 08:00 to up to 18:30.

3 sources. https://clstr.news/cluster/attica-power-outages-scheduled-for-july-89-2026

### 2026-07-06: Attica and Crete face scheduled power cuts on July 6‑7, 2026

Greek grid operator DEDDIE scheduled power cuts in Crete and Attica on July 6‑7, 2026 for maintenance, affecting many municipalities and urging safety precautions.

6 sources. https://clstr.news/cluster/attica-residents-face-scheduled-power-cuts-and-crowded-beaches-amid-summer-heat

### 2026-07-03: Greek grid operator DEDDIE schedules power cuts in Athens and Thessaloniki

DEDDIE will cut power for maintenance in Athens on 3 July 2024 and in Thessaloniki on 4 July 2026, urging residents to safeguard appliances and adjust plans.

3 sources. https://clstr.news/cluster/greek-grid-operator-deddie-schedules-power-cuts-in-athens-and-thessaloniki

### 2026-07-01: Attica power outages planned for July 1, 2026

DEDDE scheduled power cuts across Attica on 1 July 2026 for network upgrades, affecting central Athens, southern suburbs and eastern districts with specific street‑by‑street time windows.

3 sources. https://clstr.news/cluster/attica-power-outages-planned-for-july-1-2026

### 2026-06-29: Greece schedules widespread power outages on June 29, affecting Attica and Thessaloniki

Greece will cut power on 29 June 2026 in Attica and Thessaloniki for maintenance, prompting extensive outages and heavy traffic delays in Athens.

6 sources. https://clstr.news/cluster/athens-power-cuts-trigger-major-traffic-snarls-across-attica-on-june-29

### 2026-06-27: Greek power grid operator DEH schedules widespread electricity outages

DEH plans scheduled electricity cuts on 27 June in Attica and 28 June in Thessaloniki, Delta, Kordelio‑Evosmos and Lagkada, urging residents to take safety precautions.

3 sources. https://clstr.news/cluster/greek-power-grid-operator-deh-schedules-widespread-electricity-outages

### 2026-06-25: Greece schedules extensive power cuts for Thursday, June 25

DEDDIE will cut electricity on Thursday 25 June 2026 across Crete and Attica, affecting numerous municipalities with outages from early morning to late afternoon.

5 sources. https://clstr.news/cluster/greece-schedules-extensive-power-cuts-for-thursday-june-25

### 2026-06-23: DEDDIE schedules power cuts across Attica and Crete on June 23‑24

DEDDIE will cut electricity in many Attica districts and parts of Crete on June 23‑24 2026 for maintenance, urging residents to take precautions.

4 sources. https://clstr.news/cluster/water-and-power-outages-scheduled-in-attica-on-tuesday-23-june

### 2026-06-18: Attica region hit by scheduled electricity and water outages on June 18‑19

Attica faces planned power cuts on June 18 and water supply interruptions on June 19, affecting multiple municipalities; utilities advise residents to prepare.

3 sources. https://clstr.news/cluster/attica-region-hit-by-scheduled-electricity-and-water-outages-on-june-1819

### 2026-06-15: Power outages planned across Attica on Monday, 15 June

DE.D.H.E. will cut electricity on 15 June in multiple Attica districts, with outages from morning to mid‑afternoon for maintenance.

2 sources. https://clstr.news/cluster/power-outages-planned-across-attica-on-monday-15-june

### 2026-06-13: Attica, Greece Faces Scheduled Power Cuts on June 13, 2026

DEDDIE will cut electricity in eight Attica municipalities on 13 June 2026 for network upgrades; residents advised to take safety precautions.

3 sources. https://clstr.news/cluster/attica-greece-faces-scheduled-power-cuts-on-june-13-2026

### 2026-06-09: Greece's DEDDIE Schedules Power Outages in Attica and Crete

DEDDIE will cut electricity in Attica on 11 June and in Crete on 10 June 2026 for maintenance, with outages lasting from early morning to midday and safety warnings issued.

4 sources. https://clstr.news/cluster/greek-utility-schedules-power-outages-in-attica-and-crete

### 2026-06-08: Attica faces scheduled power outages on June 8‑9

DEDDIE will cut power in Attica on June 8‑9 for maintenance, affecting ten municipalities on Monday and additional areas on Tuesday.

2 sources. https://clstr.news/cluster/attica-faces-scheduled-power-outages-on-june-89

### 2026-06-05: Greek power grid operator DEH schedules maintenance‑related outages across Attica

DEH scheduled power outages in Attica on 5‑6 June 2026 for maintenance, affecting key districts and advising residents to disconnect appliances.

3 sources. https://clstr.news/cluster/greek-power-grid-operator-deh-schedules-maintenancerelated-outages-across-attica

### 2026-05-30: Greek power grid operator DEDDIE schedules electricity outages in Athens and Thessaloniki

DEDDIE will cut electricity on 31 May 2026 in Athens and Thessaloniki for network maintenance, advising residents to take safety precautions.

2 sources. https://clstr.news/cluster/greek-power-grid-operator-deddie-schedules-electricity-outages-in-athens-and-thessaloniki

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Cite as: Greece power and water outages continue amid maintenance. CLSTR, https://clstr.news/situations/greek-power-grid-maintenance-outages