The Internal Revenue Service today issued a warning about possible fake charity scams emerging due to Hurricane Harvey and encouraged taxpayers to seek out recognized charitable groups for their donations.

Leaders of the conservative House Freedom Caucus are frustrated that Republican leaders haven’t yet released details of their tax overhaul plans, saying they’re concerned that time is running out to deliver on their promise of a revamp. “At some point you’re going to have to call the play. You’re going to have to get specific,” Representative Mark Meadows, the caucus chairman, said Thursday at a Bloomberg News breakfast. “We can’t answer it if we don’t know what the details are. It’s time to make some decisions and get on with it.”

SINGAPORE — 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 has shut one-fifth of U.S. oil refineries, crimping demand for crude but raising fears of a fuel shortage. U.S. West Texas Intermediate (WTI) crude futures <CLc1> were at $46.30 per barrel at 0359 GMT (11.59 p.m. ET), down 14 cents from their last close. Brent crude futures <LCOc1> were down 20cents, at $51.80 a barrel.

The Internal Revenue Service has signed a contract with a company called Chainalysis that offers software for analyzing and tracking bitcoin transactions.