This situation obviously cannot go on. During the last month, U.S. crude stockpiles have dropped by 18 million barrels out of a total commercial reserve which is now just over 300 million barrels. Remember that much of that 300 million is below the minimum operating threshold and as a practical matter is not useable.
This is the important point - it won't quite be a summer of doom, just bad. But once supply disruptions begin, there are hard to stop, and commerce will be interupted.
Basically the article is saying we may be closer than we think to outright shortages somewhere in the US.