In a matter of weeks, Europeans will begin heading off on their summer vacations — whether or not there will be enough jet fuel to transport them all remains an open question.

Here are three charts that go some way toward providing an answer. Chief among the uncertainties are how quickly and fully the Strait of Hormuz — the vital waterway linking energy infrastructure inside the Persian Gulf to the rest of the world — will reopen, and, in the meantime, to what extent Europe can secure replacement supplies.