Can hot weather cause MC?

So we had a camping trip to Lake Pleasant in Phoenix, AZ planned out before I found out I was pregnant. Temps are going to be 100-110 day time/80s at night. I heard in early pregnancy letting your body overheat can cause neural tube defects, I'm only 5 weeks. I've done this before not being pregnant and it's rough in those temps. I miscarried during our Hawaii vacation last Oct., I was in the heat and ocean the entire time. I wonder if the high temps could have led to that. Anyone have any input or info on this? I am willing to cancel this camping trip if I have to for the safety of my little babe.