Eight districts in Pakistan's Sindh province have declared a health emergency due to the floods caused by heavy rains, the media reported Sunday.According to officials, Sindh Health Minister Saghir Ahmed declared an emergency in the province with particular focus on the eight districts, Dawn online reported.Sindh's health department has requested the chief minister to provide special funds and equipment to the public health sector to deal with the situation.Pakistan's National Disaster Management Authority (NDMA) Saturday said that at least 280 people have been killed due to heavy rains and floods in the country.NDMA spokesman Ahmad Kamal said more than two million people have been affected.