If I might add to that as a non-scientist, I would nonetheless repeat the caution that has been made to me many times, which is that this data provides a snapshot. On the one hand, it's comparing against a long-term trend, and then we have a snapshot.
The question is, then, is that something to worry about? It's important data. We can look into the issue. Is it something to worry about? What was the cause? Was the cause something that needs to be addressed? Was it simply a statistical variation? Is it something we need to monitor over time?
But I'd caution all readers against saying, “Okay, red means bad and means there's a problem.” It might. It means we should look at it. That's all it means.