Mumbai, 26 : State has slightly prolonged waiting period for monsoon this year as per the opinion of weather experts. Despite entry of monsoon in Adman region, it is predicted to march ahead at a slower pace. This will prolong monsoon’s entry in the state of Kerala till first week of June. In state, presence of monsoon is expected not before 8th of June. The heat wave in state will continue as no change in temperature is expected till 31st of May.