Father and son dead in river as flood threat grows

As the rain continues, Sydney is approaching its wettest August since records began in 1858. (Dan Himbrechts/AAP PHOTOS)

A father and son whose car crashed into a river have been found dead, as an abnormally wet August threatens rain records.

Police divers found their car about 11.20am on Thursday after it crashed into a tree and went into the Macdonald River at St Albans, northwest of Sydney, late on Wednesday.