Why are swarms of locusts invading the UAE and neighbouring countries?

This is the biggest outbreak of locusts in 70 years
In this photo taken Wednesday Feb 5 2020 young desert locusts that have not yet grown wings jump in the air as they are approached as a visiting delegation from the Food and Agriculture Organization FAO observes them in the desert near Garowe in the semiautonomous Puntland region of Somalia. The desert locusts in this arid patch of northern Somalia look less ominous than the billion member swarms infesting East Africa but the hopping young locusts are the next wave in the outbreak that threatens more than 10 million people across the region with a severe hunger crisis AP PhotoBen Curtis
AP
In this photo taken Wednesday Feb 5 2020 young desert locusts that have not yet grown wings jump in the air as they are approached as a visiting delegation from the Food and Agriculture Organization FAO observes them in the desert near Garowe in the semiautonomous Puntland region of Somalia. The desert locusts in this arid patch of northern Somalia look less ominous than the billion member swarms infesting East Africa but the hopping young locusts are the next wave in the outbreak that threatens more than 10 million people across the region with a severe hunger crisis AP PhotoBen Curtis
27May2020
Sarakshi Rai