A global heat record may have been broken in southern Pakistan earlier this week. While Australia just registered its warmest April on record in terms of maximum temperatures, other parts of the world were sweltering more severely last month. Nawabshah, a city in southern Pakistan, registered a maximum temperature of 50.2 degrees on Monday afternoon. According to climate experts, this may be the highest temperature ever reliably measured during April across the entire Asian continent, and possibly a new April world record. While it's possible that Nawabshah's scorching heat on Monday is a new world record for April, it's impossible to know for sure. The authority on such matters, the World Meteorological Organisation, doesn't carry out official reviews of monthly heat records. This makes it very difficult to know whether it is an all-time monthly record. They do, however, asses all-time temperature records if they are challenged. According to the World Meteorological Organisation, the highest temperature reliably recorded on Earth was 56.7 degrees at Furnace Creek in California during July, 1913. Australia's highest temperature on record was 50.7 degrees at Oodnadatta Airport on January 2nd, 1960.