Let's put it in some proper perspective for the end of the month....
May Rainfall for Sydney
Wettest on record 585.0 mm 1919
Wettest this month 27.2 mm 21st
Total this month 115.2 mm 14 day(s)
Long-term average 122.3 mm 11.9 day(s)
That ought to cheer you all up.
Just be glad it is not 1919 !!