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Sydney's Scorching Summer: Twice Above 42C!
17 Jan
Summary
- Sydney experienced over 42C twice in one summer for the first time in 13 years.
- Urban heat island effect creates a 10C temperature difference inland.
- December also saw a significant heatwave, preceding the summer's records.

Sydney faced an exceptionally hot summer, marked by two separate instances of temperatures surpassing 42C. This climatic milestone, the first in thirteen years, underscores the severity of recent heat events. The city also experienced a punishing heatwave in December prior to these summer records, contributing to the overall extreme conditions.
The modern urban landscape significantly amplifies the heat. Dark roofs and asphalt surfaces contribute to the urban heat island effect, creating a pronounced temperature gradient. This phenomenon results in inland areas such as Holsworthy and Penrith registering up to 10C higher than coastal regions.
This intense heatwave also heightened the risk of bushfires, posing a significant threat to the region. While authorities eventually managed to slow the spread of these fires, the underlying conditions of extreme heat indicate ongoing environmental challenges for Sydney.




