Hi pal best of luck on your first grow, you have got past Day 2 already so is already better than mine was
The clip on fans are going to be a good way to get temps down a bit, the only drawback is going to be it is most likely going to pull the RH down more, you can try putting a bowl or two of water in the tent as a cheap method to get the RH up a bit, or if you feel like splashing out a bit 20€-40€ a ultrasound/mist humidifier will get the RH in range while the fans keep the temps down.
As plants get bigger and they seem to create their own atmosphere and RH starts to rise on its own so less work is needed to keep it high, and if anything with a tent full of flowering girls the battle is going to be keeping RH down by replacing the old humid air.
A few bottles of frozen water can also be a temp method to knock temps down a couple of degrees, but is really more hassle than its worth as you can imagine it down take long till they thaw and need replacing, so gonna need time and freezer space.
Just about anywhere in Spain summer and in the south Spring is going to be hot under HPS, could always try to cool the room the tent is in using a portable AC unit or other method you can think of, so air being pulled into the tent is fresh enough to cool things down inside.
Also be careful over watering at this stage especially with those higher temps, as they top soil will dry and look like they need a drink but will still be pretty wet a couple of cm down, just give the soil a little poke with you finger to check and they just want to be moist around the stem at this stage and the soil not overly wet and to tightly packed.
As for the pics they need to be rotated 180° twice and then saved again, then should display fine after uploading. Knocked up a quick video that shows how to do it in windows.