"It [the water] was up well over our fences here, right the way through, so pretty much everything you can see here out the back behind us was gone."
Thanks to his neighbours, stock was able to be held on another farm until flooding had died down.
"Now it's just a case of getting through those paddocks and letting them regrow."
A week on, Wyndham Rugby Football Club members had spent the past few days volunteering their time to help their manager clean up the wreckage.
"We'd sort of planned on having the weekend off to be honest ... but we had about just under 30 people turn up yesterday, so by default, we just got in to it," Henderson said.
Fixing fences was the main focus.
About a dozen team members were on site yesterday in a bid to strip fencing of debris and rebuild what had been washed away.
Player Joe McRae said he reached out to his fellow team members to see if they would get stuck in and help.
"Mike does a lot for our club so I just encouraged a few guys to get out here and give a hand."
While some players were not farmers, "the beauty of it" was they were still helpful.
Listen to Rowena Duncum's interview with Mike Henderson on The Country Early Edition last Friday:
Henderson said the support from the community, as well as farming and agricultural industry groups had been "absolutely brilliant" and "really, really humbling".
"... The likes of rural support, they've been really good, we've really noticed that.
"I think probably 10 years ago that wouldn't have happened, a lot of people wouldn't have asked how we were.
"That's been huge, actually."
Southland Federated Farmers meat and fibre chairman Dean Rabbidge said about 45 people had volunteered to help the "Farmy Army" tend to farms affected South of Gore on Saturday, about 80 on Sunday and "40-odd" yesterday.
Many had travelled from out of town to offer skills and "moral support".
"It goes to show the rural spirit, no-one has complained they've just gone and done it."
More help was needed for farmers north of Gore.
"I think there are a few people who are too proud to ask for help and need it, but that's what we're here for."