In each case their annual Cup day racing was for many years one of the two annual big days out, alongside each town's A and P Show.
The proposal comes in an acceleration of racing's plan for the future, in which it had been foreshadowed that Wairoa could be among a first group to go, with Waipukurau likely to have a stay of execution and time to possibly protect its future in the next few years.
Also set for the chop is the Poverty Bay Turf Club's only race day at its course on the outskirts of Gisborne, but racing will continue at Woodville, which had been among those at risk of being closed.
There is now a consultation period ending on June 15, with the 2020-2021 calendar to be confirmed by July 3.
Wairoa club president Paul Toothill was not commenting pending the consultation, while the Waipukurau club committee is expected to consider options.
In both cases the news is thought to have been received only on Friday, almost at the same time as the public announcement, which includes the scrapping of racing big city club Avondale in Auckland, where big racing continues at Ellerslie.
An indication of Waipukurau's reluctance to roll-over came in a Facebook post when it announced the 11th hour cancellation of the March meeting, which had been set to go ahead without the public.
The post said: "We will be back – Stay strong CHB."
Wairoa mayor Craig Little, who goes to the Wairoa races on at least one of the two days every year, is angered, having seen a battle a year ago.
"I believed we had a reprieve," he said. "When I heard this on Friday I thought: This is a joke. It's been one of the two big events for everyone in Wairoa for many years. We are a small community. We can't afford to lose it from our calendar. What the hell else do we have left?"
All racing in Hawke's Bay and the East Coast is now expected to be in Hastings, with the draft calendar comprising 14 race dates at the Hawke's Bay Racing Centre, one more than last season.
The dates are: Saturday, September 19 (Spring Racing Carnival day 1); Saturday, October 3 (carnival day 2); Saturday, October 17 (carnival day 3); Sunday, November 8; Wednesday, December 9 (twilight); Friday, January 1 (New Year's Day Races); Thursday, January 28; Sunday, February 21; Wednesday, March 3 (twilight); Saturday, April 17 (Hawke's Bay Cup); Saturday, May 1; Wednesday, May 26; Saturday, July 3 (Hawke's Bay Steeplechase and Hurdles); Thursday, July 22.