These conditions collectively led to sudden rise in the water levels of rivers Kosi, Bagmati, Kamka Balan, Gandak, Budhi Gandak and their tributaries.
The heavy discharge of water was augmented by the arrival of very heavy rains-on July 12 and 13, the northern Bihari districts witnessed extremely heavy downpour that ended up breaking a 54-year-old state record of heavy rainfall in 24 hours. Subsequently, all 56 sluice gates of the Kosi barrage were opened, and three lakh cusecs of water was released towards Bihar. Instead, the flooding began due to a downpour in Nepal, with which Bihar shares its northern border.īetween July 11 and 12, 2019, Nepal’s Simara weather station recorded a total of 478.40 mm rainfall, which is more than two-thirds the amount of rain it normally receives in the entire month of July (580.2mm). While most floods are typically caused by heavy rainfall in that particular region, the floods in Bihar preceded monsoon rains in the state. People along with their livestock move towards higher lands in Bihar’s flood-hit district of Katihar on July 15, 2019.
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