THE Klang Valley suffered a major power outage for close to three hours today, causing disruption in traffic and work.

Areas that were affected included Petaling Jaya, Cheras, Bangi, Bayan Lepas, Seberang Jaya, Panchor dan Bandar Indera Mahkota.

Blackouts were also reported in Kedah, Pahang, Negri Sembilan, Perak and Penang.

In a statement, Tenaga National Bhd said the outage was caused by faulty equipment at its Yong Peng East substation in Johor. 

The Malaysian Insight looks back at the history of the worst incidences of power outage reported in the country.

1992:

On September 29, the country suffered a long and widespread blackout caused by lightning striking a transmission facility and causing a rolling failure in the transmission and distribution system. The outage lasted days.

1996:

On August 3, a transmission line near the Sultan Ismail power station in Paka, Terengganu, tripped, causing all power stations in Peninsular Malaysia to collapse.

This resulted in a massive power failure for several hours. In the wake of that, the government moved to allow five independent power producers to enter the electricity-generation business.

2003:

On September 4, several states, including Kuala Lumpur, Selangor, Negri Sembilan, Malacca and Johor suffered a blackout due to a power failure. The power outage lasted for five hours from 10am-3pm.

2005:

In February 17, a fault on the main transmission line near Serendah, Selangor caused a power outage in the northern states including Perak, Penang, Kedah and Perlis.

2013:

The last major outage was reported on June 27, this time in Sarawak.

A fault at the Bakun Dam caused a trip across various power grids, resulting in major traffic congestion.

In July, parts of Kuala Lumpur, Selangor and Puchong also suffered a blackout. – July 27, 2022.