According to the Hanoi Power Corporation (EVN Hanoi), persistent hot weather in the final days of May, with temperatures at times exceeding 40 degrees Celsius, led to a significant increase in electricity demand throughout the city.
Residents are advised to set air conditioners at 26 degrees Celsius or higher and use them together with fans to improve cooling efficiency (Photo: Khong Chiem).
The utility said operational indicators for Hanoi's power system reached new records, while electricity consumption at many households rose substantially compared with previous months.
During the period of extreme heat at the end of May, average daily electricity consumption in the city reached 93.33 million kWh, up 15.3 per cent from the previous month and 19.6 per cent higher than the average recorded during the same period in 2025.
Residential customers accounted for more than 54.6 per cent of the city's total electricity consumption.
EVN Hanoi said the sharp increase in electricity use during late May will directly affect household power bills issued in June.
The utility attributed the rise primarily to increased use of cooling appliances during the prolonged hot spell.
Air conditioners, in particular, have been operating for extended periods, especially during the evening, resulting in significantly higher electricity consumption than under normal weather conditions.
As extreme temperatures persist, EVN Hanoi has urged residents to use electricity more efficiently.
The company recommends setting air conditioners at 26 degrees Celsius or higher and combining their use with electric fans to improve cooling efficiency. Residents are also encouraged to use Eco modes on electrical appliances where available to reduce power consumption.
Other recommendations include switching off appliances when not in use, avoiding the simultaneous operation of multiple high-power devices and disconnecting standby power sources to minimise unnecessary electricity use.
The utility also advised households to service and clean air-conditioning systems regularly and to prioritise appliances equipped with inverter technology or five-star energy-efficiency ratings to improve energy savings during the summer months.
