A day after sweeping three byelections in Ontario and Quebec that gave him a majority in the House of Commons, Prime Minister Mark Carney has announced that he is temporarily removing the federal excise tax on gas and diesel.

The move means that the cost of gas will drop by ten cents on a litre of gasoline and four cents per litre of diesel starting Monday and lasting until Labour Day.

The fuel tax holiday, which Carney said would also see the four cent per litre excise tax removed on aviation fuel, is expected to cost an estimated $2.4 billion.

“We all know that because of the war with Iran fuel prices have increased sharply around the world including right here in Canada,” Carney said in Ottawa Tuesday. 

The move will act as a bridge to help get Canadians over “short-term pressures,” he said. 

“Today’s cut to the fuel excise tax is a responsible temporary measure consistent with what it takes to build a stronger economy, a more affordable economy combined with sound fiscal management.”

In a statement, the government said the move “is a responsible measure that will reduce operating costs for truckers and businesses in the food, agriculture, housing, construction, and delivery sectors.”

The current national average for a litre of gas is just over 176 cents, up from just over 126 cents a litre before the United States and Israel launched their attack on Iran and oil stopped flowing through the Strait of Hormuz. 

About a fifth of the world’s oil transits through the strait from states in the Persian Gulf including Iran, but that passage has been all but shut by the threat of Iranian drones and mines since the conflict began.

When talks between the United States and Iran to end the war and reopen the strait failed, the U.S. announced it would begin a naval blockade of Iranian ports and attempt to reopen the straight to traffic from other countries.

That announcement saw prices dip slightly but the crisis in the strait continues and volumes have yet to resume to anywhere near the pre-war averages.