Oil prices slid on Wednesday but gasoline spiked to their highest since July 2015 as flooding and storm damage in the wake of Hurricane Harvey knocked out 1/5th of US refineries crimping demand for crude but raising fears of fuel shortages.

Hurricane Harvey, which has been downgraded to a storm, has caused massive floods across coastal Texas, including in Houston. It is now moving into Louisiana, where more floods are expected.

“Catastrophic and life-threatening flooding continues in southeastern Texas and portions of southwestern Louisiana,” the National Hurricane Center (NHC) said in its latest note.

WTI futures were at $46.31 per barrel at 0504 GMT, down 13 cents from their last close. Brent futures was down 21 cents, at $51.79 a barrel.

In the refined product market, price movements have been more dramatic. U.S. gasoline prices were over 3 percent higher at $1.8396 per gallon. Prices earlier climbed to the most since July 31, 2015, at $1.842.