What is exhaustion delirium?

Not a diagnosis. There is no medical term exhaustion delirium but perhaps this is referring to dehydration from heat exhaustion causing confusion.
See below. According to mobsy medical dictionary, a delirium that may result from prolonged physical or emotional stress, fatigue, or shock associated with severe metabolic or nutritional problems. A delirium is an acute onset on altered mental status change. If not promptly, it becomes exhausted one.