(San Francisco, CA) -- U.S. gas prices continue to climb as the summer heats up.
Triple-A says there are a variety of factors affecting price but two main reasons are causing a spike. Global supply is constrained after OPEC nations cut production.
Russia is also exporting less crude oil. Beyond economic manipulation, this summer's record heat is also to blame.
Refineries generally cut back production when temperatures exceed 95 degrees for safety reasons.
But that also puts a squeeze on the global supply chain.
Currently California has the highest price in the nation at an average of 5-01 per gallon according to Triple-A.
Washington is close behind at 4-96 and Oregon sits at 4-92 per gallon as of Tuesday.