Yea, that's a solid POT. You should be very comfortable there even if you aren't able to find another POT race between now and October.
My race next weekend could be hot, although right now it's looking like 60-70s in the morning. Just in case, I started researching pre-cooling strategies. I haven't finalized my plan yet, but this is what I've got so far (WARNING!!!! upcoming block of text, LOL!):
1) Haircut (It's getting bad...., LOL!)
2) Ice
Cooling towels on head, neck, torso, and arms
3) Rub ice on head, neck, torso, and arms
4) Drink 10oz slushy ice mix about 10 min prior to race
5) Put my handheld bottle in an ice cooler until right before the race starts
6) If possible, have someone meet me at halfway mark and give a iced bottle of water to be consumed and poured on me
The thought process on pre-cooling is that a limiting factor in performance is when your core body temperature (or your perception of your core body temperature) reaches around 104 degrees the body starts to force a slow down. If you reach this point, there is little you can do mid-race. Thus, the strategy is to pre-cool your body prior to the race. If you lower your core body temperature by a few degrees, then the body has further to raise up to hit the 104. I've used this strategy in the past but only used item #2. According to my recent research binge, no one method is better than any other, but a combination of methods is the best plan of attack. Thus, a strategy that incorporates cooling the body within (e.g. ice slushy drink) and cooling the skin on the outside (e.g. ice and ice towels) will help with the pre-race cooling. The ice plays a critical role because that short period of time that forces the ice solid into liquid water requires a significant amount of energy.
"Heat from the skin and surrounding tissues is absorbed by the ice, and as a result, the ice changes to water through a process called fusion (melting). Based on the energy exchange theory of melting, ice requires ~80 times more thermal energy to increase the temperature of water by 1 degree due to its phase change that must occur when water changes from its solid to liquid phase (at 0 degrees, 333.55kJ (if ice) vs 4.18 kJ without phase change). As a result, cooling with ice may be achieved with lower amounts of integument, at a faster rate and to a greater magnitude when compared to water." (Precooling Methods and Their Effects on Athletic Performance, Ross et al., 2013)
The same concept plays out both with the ice slushy drink and the ice to the skin. The colder the bottle of water drank mid-race the same concept, and if you can get a slushy ice mix then as well then even better. I'll add one other thought that I haven't read anywhere but that makes sense to me. If you put the ice in a bag (like a plastic bag), then I would guess it diminishes the effectiveness of this plan since there is another medium to exchange heat with. My guess is that direct contact between the skin and ice is the most optimal means to execute this plan.
Some other possible suggestions:
1) Air-conditioned building or car. If you can stay inside a cool building for as long as possible, you reap some benefits of cold induction. The protocol suggests a room at 4 degrees, but practically you're not going to find that. My alternate suggestion is a very cold car. If possible, just leave the building/car right as the race is starting.
2) Wear a phase transitioning vest. These vests are expensive, but the premise is the same as the ice/ice packs to the skin. The one advantage they have over the ice/ice pack methods is that they can be worn during warm-ups and thus keep the body cooler for longer. You have to buy a nice light one though because the added weight during warm-up can cause gait changes and that introduces a new problem (that's the reason why a ice or ice pack vest isn't as practical because it would be significantly heavier). It seems from the research that if you only use a phase transition vest for after the warm-up than ice/ice packs is equivalent in its capability.
3) Take a very cold shower for a long duration before the race. This only works well if the race is local. But take a cold shower for 30ish minutes and then head out to the starting line. The effects of the cold shower should last about 1-2 hours so that'll effect whether this is an effective race strategy. They also sell portable cooling pools, but they're expensive and require an electrical outlet (so they're not practical).
4) Swig of mouth wash. This one seems the most interesting to me. Essentially, you swig and spit out some "methanol-based" mouth wash. The kind that after you spit it out give you that cooling/tingling sensation. Apparently this "cooler" feeling in the mouth sends messages to the body that it's cooler than it thinks it is. This means rather than actually effecting the core body temperature, it affects the mind's perception of how hot it is. I find this one the most interesting because it suggests that the actual lowering of the body's temperature isn't solely important but that altering one's perception of temperature can be effective as well. This opens the door to other manipulations of perception of temperature as possible pre-cooling strategies. Although I wasn't able to find any other suggestions.
So, does it matter? Should I even worry about pre-cooling? Well, yea it's actually a pretty big deal. The improvements seen with pre-cooling range from 7-13% better races. The opposite way is to look at it like this. Say I would run a 41:46 10K under ideal conditions. And let's suppose a pre-cooling strategy effectively staved off any negative effects of heat accumulation. Then a 7% loss in performance because of no pre-cooling would be a 44:38 and a 13% loss in performance would be a 48:00 10K. So a nearly 6 minute improvement just by implementing a good pre-cooling strategy. Yea, I'm all for that!