CHICAGO (CBS) – At one time, $5 per gallon gas seemed like a farfetched idea, but that is no longer the case.

As CBS 2’s Roseanne Tellez reports, as of Monday, the average price for a gallon of regular unleaded gasoline in the Chicago area is $4.11, compared with $3.71 a month ago, and about $3.10 a gallon at this time a year ago.

Some experts say $5 per gallon gas is possible by Memorial Day. Others caution that reaching that mark is unlikely over the next six weeks, but in Chicago, the prices keep rising to near-record levels.