What does Isaiah 15:5 mean?

My heart aches for Moab. Its refugees run as far as Zoar and Eglath-shelishiyah. They climb the road to Luhith weeping, and on the way to Horonaim, they cry out in despair. Isaiah 15:5 - Modern Text Bible

(The prophet feels deep compassion for Moab’s suffering as its people flee in desperation.)