Those struggling in the heat won't find any respite in coming days as temperatures are forecast to soar to 30C.
Metservice meteorologist Tom Adams said the region would swelter in a tropical air mass for the foreseeable future.
"It is looking quite hot and sunny for the next wee while. Temperatures are definitely going to get pretty warm, especially as we go into next week.
"It's a little bit cooler when a southerly goes through on Friday with temperatures of 27 degrees but by the time we get to Tuesday next week it will be back up to 29 degrees and then hit 30 degrees on Wednesday."
After a dark cloud mass rolled over Hawke's Bay on Tuesday, bringing thunder and lightening, the coming weather would be relatively settled from now, he said.
Overnight temperatures today and tomorrow would hover at 20C and only drop to 18C at the end of the weekend before rising to 21C next week.
"It will be relatively humid because we're in a tropical air mass and with those high temperatures it will feel quite sticky," Mr Adams said.
"There is a weak southerly coming through on Friday but it's not really going to make much of a difference to temperatures in Hawke's Bay. There might be a few showers, particularly inland."
The warm weather was driven by high pressure sitting over New Zealand.
"Something that's going to drive temperatures up for a lot of places next week is the high shifting across to the east, and particularly as south northwest winds take over.
"When northwesterly winds take over it increases the wind temperatures because the air is going up and over the mountain ranges."
The North Island would also be affected by warm air being dragged from the tropics at the end of the week, he said.
"What is looking likely is there will be some warm air coming down from the north which will contribute to the warm temperatures in Hawke's Bay."
It was possible the region would receive rainfall at the end of the week but the quantity was yet to be determined, Mr Adams said.