A human body may be able to adapt to extremes of dry-bulb temperature (commonly referred to as simply temperature) through perspiration and associated evaporative cooling provided that the wet-bulb temperature (a combined measure of temperature and humidity or degree of ‘mugginess’) remains below a threshold of 35 °C. (ref. 1). This threshold defines a limit of survivability for a fit human under well-ventilated outdoor conditions and is lower for most people.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/future-temperature-southwest-asia-projected-exceed-threshold-human-adaptability
[2] http://admin.indiaenvironmentportal.org.in/category/author/jeremy-s-pal
[3] http://admin.indiaenvironmentportal.org.in/category/author/elfatih-b-eltahir
[4] http://admin.indiaenvironmentportal.org.in/category/journal/nature-climate-change
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/asia
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/red-sea
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arabian-sea
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/turkey
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/iraq
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kuwait
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/saudi-arabia
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-habitat
[18] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-mitigation
[19] http://admin.indiaenvironmentportal.org.in/category/thesaurus/extreme-weather-events