Temperatures dipped marginally in southern India Friday where a deadly heatwave has killed at least 1,800 people, officials said. The bulk of casualties were reported from the southern states of Andhra Pradesh and Telangana, which saw their highest sustained summer temperatures in 12 years over the past week, dpa reported. At least 300 more deaths had been counted in Andhra Pradesh since noon Thursday and over 100 in Telangana taking the total toll in these two adjacent states to 1,774, disaster management unit officials of the two states said. Many of the deaths were reported from Andhra Pradesh's coastal districts where the mercury hovered above 44 degrees Celsius for a week but showed a dip Friday to the high 30s. Another 43 deaths were reported from the eastern Indian state of Orissa, seven from Gujarat state in the west and two in the national capital.