Thimphu, October 30 (IANS) A glacial lake outburst flood (GLOF) at Shintaphu Lake in northwestern Bhutan has triggered flash flood warnings for parts of West Bengal and Assam, with authorities monitoring vulnerable areas along rivers flowing towards the t. The incident occurred on Thursday evening in Bhutan's Gasa district, washing away infrastructure at Gasa Tshachu, a popular natural hot spring situated near the Mo Chhu River.