Flooding and landslides triggered by heavy rainfall have killed at least 45 people in Nepal in the past few days, with more deaths reported across the Himalayan border in India, officials said on Sunday.At least 31 others are missing in Nepal, either swept by swollen rivers or buried by mudslides since delayed monsoon rains began pounding the region Friday, Nepal’s National Emergency Operation Centre said.The Centre said nine key motorways remained blocked by floods and mudslides and attempts…