Advice on running in high temp

Hi everyone! Was hoping to get some advice as im already getting anxious🙈 Im currently based in Europe and have an upcoming race during my vacation in Ph next month. I normally run early mornings with low temp. Last week i tried running under the sun with 22C and that already felt hard enough. I know the race does start at 4am na wala pang sunrise but the temp is like 28c or more. Any tips please how I can adjust my body? Do people run with those neck fans?🙈 should i take some ice with me or splash some water on my chest? Not really aiming for PBs, i just want to finish and enjoy. Thank you🏃‍♀️