
The previous record for a winter evening was 26.23 gigawatts on Jan. 9 2017.
Poland, which generates electricity mostly from outdated coal-fuelled power stations, faces the risk of power shortages when temperatures reach extreme levels as increased demand overloads the system.
Freezing temperatures have persisted in Poland for the past few days and weather forecasters said they will continue until Friday. Temperature in Warsaw was at minus 11 Celsius (minus 51.8 Fahrenheit) on Wednesday morning.