The pipeline serving SEA ( Seattle) and PDX (Portland) has been shut down. ( just use the 'topic' as a search term to find many articles)
So far impact has been minimal, but airlines have begun to say that some longer flights may have to stop for fuel enroute to the destination. Delta has advised this might apply to some international flights
If you are arriving at SEA you may find the landing to come down with a bigger thump as airlines are starting to put on more fuel so they need to get less at SEA. The plane will be heavier when it lands
No truth to the rumor you can bring a 5 gallon can of Jet-A through security at SEA