Why does my team notice my burnout before I do?

They see it because they stand outside you. You are inside the storm, doing the next task and the next, so the shortened fuse and the shrinking patience feel like the weather rather than a warning. The people around you feel the change in you before you can name it in yourself. That is not their failing. It is simply the truth about how strain works. The good news is that you now have a mirror. If your team can read your condition, you can borrow their eyes. You do not have to trust only your own sense of how you are doing, because that sense is the last thing to catch up. Ask one person you trust to tell you honestly when they notice you getting shorter or more closed off. Give them permission out loud. Then, when they say it, do not defend yourself. Just take it as information, and rest before the tank is fully empty rather than after.