A rare deluge of rainfall left blue lagoons of water amid the palm trees and sand dunes of the Sahara desert, nourishing some of its driest regions with more water than they had seen in decades. Southeastern Morocco 's desert is among the most arid places in the world and rarely experiences rain in late summer.

An oasis is reflected in a lake caused by heavy rainfall in the desert town of Merzouga, near Rachidia, southeastern Morocco, on Oct. 2. A rare deluge left blue lagoons

Typically known for its droughts, meteorologists say it has been 30 years since this much rain has fallen in the Sahara Desert in Morocco.

Two days of rainfall in south-east Morocco that exceeded yearly averages in several areas has caused flooding in the Sahara desert for the first time in half a century. Dramatic pictures of the flooding have emerged on social media.