A Featherston farmer says he felt "helpless" as a bolt of lightning instantly killed two heifer calves as the storm front came through Wairarapa on Monday.
Dairy farmer Selwyn Donald witnessed the bolt of lightning hitting the ground at his farm on Ashbys Rd around 3pm, where about 30 calves were huddled near a fence.
Mr Donald was about 50m from the strike.
Two of his calves were separate from the group and dropped as the bolt melted the fenceline and carved a two-metre trench in the soil.
"They were both just instantly dead, just lying against each other," he said.