Trailing at half-time, the Crusaders overcame the Highlanders to dodge a make-or-break date with the Blues in Super Rugby Aotearoa.
The Waratahs scored 38 points without reply in the first half as they cut loose in the rain to thrash the Reds in Sydney.
The Hurricanes still have an outside shot at the Super Rugby Aotearoa title but it was another miserable day for the Chiefs.
The Brumbies came unstuck in the rain at Leichhardt Oval, where the Rebels scored four first-half tries.
The Six Nations champions are set to be crowned at the end of October and it remains to see if there will be any fans in attendance.
The Dragons have added Jamie Roberts to their squad ahead of their return to Pro14 action this month.
Sunday's bonus-point win at Forsyth-Barr Stadium moved the Blues to 22 points, just two points adrift of Super Rugby leaders the Crusaders.