Biharreceived 3% surplus rainfall in four-month-long monsoon season which concluded on Thursday. Last year, the state had received 25% above normal rainfall during the monsoon season from June to September.
Though the state witnessed a whopping 52% below normal rainfall in September, the rainfall revived on the last day of the month on Thursday and the Met office has issued red alert for heavy to very heavy rainfall on Friday, followed by orange alert for Saturday and yellow alert.
A red alert stipulates that the authorities concerned should take necessary action with respect to expected extreme weather conditions. The orange alert, on the other hand, asks the authorities to be alert and yellow alert suggests them to be watchful for extreme weather conditions.