pc overheating issue

yesterday it was 28C outside and lol started crashing. i checked the temps, pretty much everything is overheating. so i bumped up my case fan speed in bios (was set at quiet before) today its 31C outside, and lol started crashing again. I opened the case and pointed my big fan inside (now im overheating :( ) tomorrow its 36C outside... what do i do next?
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