U.N. agencies want to strengthen national drought policies after warnings that climate change would increase their frequency and severity.

Droughts cause more deaths and displacement than floods or earthquakes, making them the world’s most destructive natural hazard, according to the Food and Agriculture Organisation, one of the groups taking part.

“We must boost national capacity to cope before droughts occur,” Ann Tutwiler, FAO deputy director-general told the five-day talks on drought in Geneva attended by scientists, politicians and development agencies.

“Unless we shift towards such policies, we face the prospect of repeated humanitarian catastrophes and the repeated threat of drought to global food security.”

In 2012, the United States experienced the worst drought since the 1930s “dustbowl”, pushing grains prices to record highs. In the past years, droughts have also affected the Horn of Africa and the Sahel region as well as China, Russia and southeast Europe.

U.N. Secretary-General Ban Ki-moon said in December that extreme weather was the “new normal”, adding that drought had decimated essential crops from the United States to India, from Ukraine to Brazil.

“No one is immune to climate change – rich or poor. It is an existential challenge for the whole human race – our way of life, our plans for the future,” he said at the time.