Brent crude prices closed 3.62% lower to settle at $39.45 a barrel, WTI dropped 4.25% to settle at $37.14/Barrel.
Crude oil prices held to gains after U.S. President, Trump resumed the White House from the hospital.
President Trump's recent improved health status lifted the morale of oil traders.
U.S. West Texas Intermediate felly by 1.57%, to trade at 39.53/barrel, after gaining 4.9% yesterday.
Tropical Storm Sally picked up its strength in the Gulf of Mexico, west of Florida yesterday.
Brent crude prices dropped 0.51% to trade at $40.58 a barrel, after rising 2.5% on Wednesday.
Brent crude was down by 0.17%, to $41.94 a barrel, after falling 1.5% on Monday.
Both Crude oil benchmarks dropped more than 2% with WTI sliding to its lowest.
Gulf Coast energy infrastructures were mostly spared the brunt of the damage
Crude oil markets are still trading unusually been less volatile this week