 A double whammy of record heat and hurricanes will likely test the resilience of American oil refiners in the coming weeks. That's according to a chorus of analysts who say the dangerous weather raises the risk of highly volatile gas prices right in the middle of peak travel season. Sitco is running its Corpus Christi refinery at minimum capacity as it deals with Beryl, which made landfall on the Texas coast as a Category 1 hurricane this morning.