Thirty villages in Saghata and Sundarganj upazilas of Gaibandha were newly flooded on Sunday as rivers flowing through the areas burst their banks after heavy shower and onrush of water from the upstream.   Water Development Board said the water level of Brahmaputra and Teesta are 27cm and 1cm above the danger level.   The overall flood condition of the district has been worsening gradually as intermittent rain has been continuing for the past few days.