The cause of a Mid Canterbury fire that destroyed one home and badly damaged another three has yet to be determined.
After damping down hotspots from Saturday's fire near Rolleston, crews have now left the area.
The rain that has been falling over many parts of Canterbury since last night has helped reduce the fire risk.
The principal rural fire officer for North Canterbury, Bruce Janes, said investigators are still looking into what started the blaze.
He said so far they have worked out that it started in two places and that the landowner was working in a paddock at the time.
Mr Janes said a separate 100 hectare fire across a farm near Hororata yesterday is believed to have been caused by smouldering rubbish in a burn pit.
Yesterday five helicopters, 15 fire engines and rural water tankers were used to fight the blaze.
No one was injured fighting the blaze.