"We have to get on to surface wear quite smartly to stop it going any further - it will rip all of the seal off and starts affecting the actual road construction."
The increased workload was expected and melting spots were already identified from previous summers, usually at high stress areas such as steep sections or tight bends.
Stone chips are spread and rolled into the liquid lanes, consolidating the road.
MetService meteorologist Tuporo Marsters said today would be hot and sunny with high cloud increasing. Northwesterly winds between 31km and 39km were expected, bringing a high of 32C to Napier and Hastings.
The overnight low will be 17C.
Friday brings showers before dawn and cloudy periods with Hawke's Bay temperatures in the high 20s with winds "dying out".
Saturday will be mainly fine with winds from the north and a cooler high in the mid 20s.
Sunday will have brief rain in the afternoon "and it's gone", leaving mainly fine weather with northwesterlies taking temperatures to 30C.
He said Hawke's Bay's warm temperatures made it "one of the better places to be" this week with Invercargill "battered" by cool westerlies.
Hot dry weather on the East Coast has resulted in a total fire ban imposed across Hawke's Bay and Gisborne.
Gas is the only permissible flame but people should take extra care with activities that could spark a flame such as off-road vehicles, machinery and mowers.
