People were moving through the waves in the Pakistani province of Sind on Wednesday.(Aamir Qureshi/AFP)The word is the height of devastation.United Nations Secretary General Antonio Guterres, visiting Pakistan devastated by floods, said on Saturday that he had "never seen" such a climatic disaster when nearly 1,400 people have died since June.“I have seen many humanitarian disasters around the world, but I have never seen climate carnage of this magnitude.I simply have no words to describe what I saw today,” he told a news conference in the port city of Karachi.Earlier in the day, just before traveling to southern parts of the country, Guterres called on states around the world to “stop this madness” of global reliance on fossil fuels.“Pakistan and other developing countries are paying a horrible price for the intransigence of the big emitters, who continue to bet on fossil fuels”, explained then the head of the UN in a tweet.“From Islamabad, I make a global appeal: stop this madness.Invest in renewable energy now.End the war on nature,” he said.The day before, the Portuguese had already been indignant at the indifference of the world, in particular of the most industrialized countries, in the face of climate change, describing the situation as "collective suicide".UN Secretary General Antonio Guterres (centre left) and Pakistani Prime Minister Shahbaz Sharif (centre right) were visiting a camp in the Sind region on Saturday.(Pakistani Prime Minister's Office/Anadolu. AFP)Nearly 1,400 Pakistanis died in these floods.Having increased in intensity due to global warming, these are caused by torrential monsoon rains and have covered a third of the country - an area the size of the United Kingdom - destroying homes, businesses, roads, bridges and agricultural crops.The monsoon, which usually lasts from June to September, is essential for the irrigation of plantations and the replenishment of water resources in the Indian subcontinent.But Pakistan had not seen such heavy rains for at least three decades.These bad weather caused flash floods in rivers in the mountainous north, which washed away roads, bridges and buildings in minutes, and a slow accumulation of water in the plains of the south which submerged hundreds of thousands of square kilometers of land. .Hundreds of makeshift camps have sprung up in the rare areas that are still dry in the south and west of the country.Raised roads or railways are often the last places where water has not crept in.With people piled on top of each other, accompanied by their livestock, epidemics are to be feared.Many cases of dengue, a disease spread by mosquitoes, and scabies have already been identified.A flood-displaced woman washed her child at a camp in Sindh province on Friday.(Aamir Qureshi/AFP)The city of Sukkur, in the province of Sind, under water on Friday.(Aamir Qureshi/AFP)Guterres says he hopes his visit will encourage the international community to financially support the country, which estimates it needs at least $10 billion to repair and rebuild damaged or destroyed infrastructure.A sum impossible to collect alone for Pakistan, because of its high debt.For the UN Secretary General, financial aid is “not a question of generosity, it is a question of justice”.“Humanity has waged war on nature, and nature is fighting back […] but it is not Sind [one of Pakistan's affected provinces] that is causing the greenhouse gas emissions that have accelerated climate change so dramatically,” he said.Pakistan is responsible for less than 1% of global greenhouse gas emissions (for 3% of the world's population) but, according to a study by the NGO Germanwatch, it is in 8th position among the countries most threatened by extreme weather events.