Will the nitro fuel get bad or warp if it gets too warm?

Never heard of fuel "warping" before...now a wing, maybe.

The fuel we use is extremely hydroscopic. That means it will absorb water from the atmosphere. You must keep it tightly capped at all times, especially on hot, humid days. Nitro also evaporates RAPIDLY, and that's another good reason to keep it tightly closed.

Dr.1