The energy grid operator has warned that the "extreme temperatures" from this week's heatwave could hit power supplies on Thursday night

Neso asks for extra supplies from electricity generators to cope with added demand on Thursday night

Extreme heat puts pressure on the electricity system by making processes less efficient and because more people want to keep cool.

More people are using more electricity for fans and air conditioning to keep cool

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The energy grid operator has warned that the "extreme temperatures" from this week's heatwave could hit power supplies on Thursday night