CENTRAL ILLINOIS -- The worst in gas prices seems to be coming to an end.
According to GasBuddy.com, gasoline prices across Illinois and the Great Lakes region are expected to drop 15 to 30 cents in the coming days.
The sudden change comes as ExxonMobil reports its Joliet, Illinois refinery is back online and increasing production.
Gregg Laskoski, a GasBuddy senior petroleum analyst we spoke with Wednesday, said prices could also decrease in the long run, once the BP plant in Indiana completes its expansion project.
"When that BP refinery is back online, it will be able to refine a lot of the heavy, western Canadian crude," said Laskoski, "and when it's able to access that crude and refine it, that should mean lower fuel prices probably next year."
Still, according to GasBuddy.com, as of Wednesday, Illinois has the highest gas price in the nation, at $4.46 a gallon in Chicago.