Translate the following English sentence to French:
"Those images of people perched on rooftops and in trees, which were transmitted across the world, have naturally caused questions to be directed at the international community and the NGOs regarding the speed of action required to alleviate the worst of the emergency situation."
Ces images de personnes sur les toits et dans les arbres, images qui ont fait le tour du monde, posent bien entendu à la communauté internationale et aux ONG la question de la rapidité des actions à entreprendre pour parer au plus pressé.