35 wet-bulb temperature is not survivable. That is not a matter of opinion, it is a fact. Your body generates heat and at that temperature it is unable to shed

35 wet-bulb temperature is not survivable. That is not a matter of opinion, it is a fact. Your body generates heat and at that temperature it is unable to shed it through any means and you will die in a couple of hours. If a major city has such a heatwave, it will almost certainly be a mass casualty event, mitigated only by the duration of the wave and how many people have A/C (or how long the blackouts last). A fan won't work because your sweat will not evaporate: in fact it just heats you up faster (like breathing on your skin in a sauna). Such temperatures have only been measured a few times on earth, so no, you have not experienced them.