Speaking to BBC Look East, Wollen said she learned about the water supply issue when she arrived at work at 10:00 BST on Sunday.
“So we went down to Tesco, got two trolleys worth of bottles of water, as much as we can possibly get, paper plates – because of the washing up, we can’t use the normal plates that we usually use – [and] we had to get [wet] wipes, so that everyone could be clean,” she said.
“We made sure that we’re doing half-hour checks on everybody to make sure they had a drink, they were hydrated, that everyone’s safe.”
The home specialises in looking after up to 45 older people, some with dementia.
She felt the home “should have been a priority” for bottled water deliveries.
Temperatures rose throughout the bank holiday weekend in Norfolk, rising to more than 30C (86F).