Sydney floods: before and after photos show how city roads and parks became rivers and lakes

Mackellar Girls Campus in Manly Vale before and after the floods hit Sydney, NSW, on Tuesday. Composite: Dan Himbrechts/Google Maps/AAP

There were extraordinary scenes across Sydney on Tuesday after hours of torrential rain soaked an already saturated city.

Roads turned to rivers and a bridge was inundated, with some suburbs almost entirely cut off on the northern beaches where more than 100mm of rain fell in six hours.