Even as the Covid caseload in the rest of the state continues its downward spiral, Khordha district is proving to be a big headache for the Odisha government. The district, which includes the capital city of Bhubaneswar, has consistently accounted for nearly 50% of the total daily positive cases reported in the state for last several weeks, the vast majority of them from the state capital. With the number of positive cases in the district breaching the 2, 500 mark, the district slipped into the ‘red zone’ on Wednesday after staying in the ‘yellow zone’ since September 18.