CHICAGO (CBS Chicago/CBS News) -- If you're filling up your gas tank in the morning, get ready for a little sticker shock.
U.S. gas prices are the highest they've been in seven years.
They are up 40 percent since January.
In Chicago, the average price for regular gas is $3.53. But some gas stations are posting even higher prices – we found one charging $3.89 per gallon.
"We believe it'll rise another 10 to 20 cents at the pump between now and the end of August," Jeanette McGee, a spokesperson for AAA, told CBS MoneyWatch.
The main factors behind the steep climb in gas prices: rising global oil prices, businesses reopening as COVID-19 eases across most of the U.S. and pent-up demand for travel, McGee said.
for more features.