No rain, but massive deluge: What really triggered Nepal`s sudden, destructive flash floods? EXPLAINED

A sudden flash flood in Nepal destroyed bridges across Rasuwa and Nuwakot, prompting high alerts in Bihar and Uttar Pradesh as floodwaters surge via the Gandak river.  

No rain, but massive deluge: What really triggered Nepal`s sudden, destructive flash floods? EXPLAINED
A sudden flash flood in Nepal destroyed bridges across Rasuwa and Nuwakot, prompting high alerts in Bihar and Uttar Pradesh as floodwaters surge via the Gandak river.