Sydney's heatwave has proven short-lived, with temperatures plunging by 14 degrees today after the city endured a day of sweltering conditions.

The dramatic cool change has brought rapid relief to residents who faced intense heat just 24 hours earlier. A drop of that magnitude within a single day is a significant meteorological shift, marking a swift end to what had been an uncomfortable stretch of hot weather for the city.

Sydneysiders are being reminded that spring weather in the city can be highly changeable, with extreme heat giving way quickly to much cooler conditions. Residents are advised to make the most of the cooler temperatures while they last.