Check out the latest pics of Winnipeg. They have the tent enclosures for all-weather work if it's just wiring that needs doing. As long as the ground work is done, the rest does not need good weather.
They can pay construction companies to build a tent and burn propane for heat. However, tents don't usually extend to overhead lines and other areas used for the final connection. Local utilities often have rules against outside work being done below a certain temperature, unless there is an emergency.