Five gasoline tankers that were en route to the U.S. East Coast diverted to the Port of Houston to help ease a supply crunch after last month’s freeze crippled the region’s refineries.

More than 1,700 gas stations are without electricity Feb. 19 because of the Texas power disaster, threatening to push pump prices even higher with key refineries in the state still shut.

The world’s appetite for U.S. diesel is falling, leaving stockpiles of the fuel at their highest level since early October.