Oil prices fell on Wednesday after industry data showed crude inventories increased more than expected and fuel stocks rose unexpectedly last week in the United States, the world’s largest oil consumer.

Meanwhile Crude oil tanks at the Cushing, Oklahoma storage hub are more depleted than they have been in the last three years, and prices of further dated oil contracts suggest they will stay lower for months.

Worldwide demand means other countries are turning to the US for crude, while also increasing the draw from Cushing.

Among refiners producing gasoline and diesel, U.S. demand for crude has soared as the economy recovers from the worst of the pandemic.

Analysts expect the decline in inventories to continue in the short term, which could further boost US crude oil prices, which have increased by nearly 25% in the last two months.

Brent oil futures were down 69 cents, or 0.8%, to $85.71 as of 0559 GMT after closing at a seven-year high on Tuesday.

West Texas Intermediate (WTI) futures fell 79 cents, or 0.9%, to $83.86 a barrel after gaining 1.1% in the previous session.

Crude oil inventories rose 2.3 million barrels in the week ended Oct. 22, the American Petroleum Institute (API) said late on Tuesday. This was above expectations for 1.9 million barrels of earnings.

Gasoline inventories increased by 500,000 barrels and distillate inventories increased by 1 million barrels, compared to the forecast for both to fall.

Analysts said prices are starting to see overbought, with Brent rising in the past eight weeks and WTI rising in the past 10 weeks. However, concerns remain about the sustainability of prices, as the worldwide uneven recovery from the COVID-19 pandemic, the worst health crisis in the last 100 years, has caused demand to plummet for months.

Natural gas and electricity prices hit all-time highs in parts of Europe and Asia in August as the global economy recovered from the pandemic and energy consumption increased faster than supply.

Earnings of China’s electricity companies in the first three quarters of 2021 fell as companies squeezed in rising coal costs they were unable to pass on to consumers. Operating costs and coal prices increased significantly in the January-September period, while electricity tariffs increased by less than 5% in the same period.

China’s thermal coal futures fell to their lowest level in more than a month on Wednesday and recorded the sixth consecutive day of declines after the government announced it would “clean up and fix” illegal coal landfills.