Expect gas prices to remain elevated for weeks if not months, experts say. Overall inflation will likely get worse in March and April before improving, Bill Adams, chief economist for Comerica Bank, said in a report.

"Inflation will accelerate in March and April as the knock-on effects of the Russia-Ukraine war push prices even higher at supermarkets, gas pumps and on utility bills," Adams said. 

The barrage of rising costs is taking a toll on consumer sentiment, polls show.