The number of deaths in India from an outbreak of the mosquito-borne dengue virus climbed to 118 on Friday, a statement issued by the federal health ministry said.
"A total number of 6910 cases (of dengue) and 118 deaths have been reported from India as a whole" up to midday on Friday, the statement said. The ministry recorded 103 deaths nation-wide late on Tuesday.
New Delhi and its neighbouring states have been the worst hit by dengue a viral infection transmitted to humans through bites of the female Aedes mosquitoes -- with 1,903 cases so far, it said.
Officials at the dengue control room at the All India Institute of Medical Sciences, India's premier medical facility, said there was a "perceptible decline in the number of new infections" in the past 24 hours.
"This is due to the lowering of the temperatures due to rains in Delhi and nearby areas," D.K. Sharma, medical superintendent of AIIMS, told AFP.
"The lower temperatures will be a factor preventing the breeding of mosquitoes."
Dengue causes a severe, flu-like illness and can lead to internal bleeding.
School children in New Delhi and some other parts of the country where dengue has been reported have been ordered to wear their winter uniforms to protect their skin from mosquito bites.
Besides dengue, an outbreak of chikungunya -- also a viral disease transmitted through the Aedes aegypti mosquito -- has affected 1,665 people nation-wide.
The government of the southern coastal state of Kerala said last week the disease had claimed 86 lives. But the federal government said the deaths were not directly attributable to chikungunya as the victims had been weakened by other underlying conditions such as heart problems.
Chikungunya causes high fever and headache, but is rarely fatal, according to the World Health Organisation.
Checking the proliferation of mosquitoes is the main preventive measure for both dengue and chikungunya, which strike during the rainy season.
Mosquito-borne illnesses affect tens of thousands of Indians during the rainy season.
A dengue outbreak in Delhi claimed more than 400 lives in 1996 when 10,000 people contracted the virus.