Generally as heat and humidity increases gastric emptying decreases. You may have gut issues as the CHO is not as easily absorbed. This varies by person, but it’s typically recommended to go a bit less on carbs and increase water intake. Anecdotally, I typically consume 110g an hour and I’ll go down to 90-100g if it’s brutally hot/humid outside. Your event is not that long so you’ll likely be finished before any real issues can develop. However, if you were racing for 6+ hours in hot/humid conditions even less carbs may be needed. Your gut will be in charge and usually is not to shy about letting you know when it’s not happy.
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