Three more people succumbed on Sunday to dengue, taking the death tally due to mosquito-borne disease in the Delhi to 28 since September.
The number of patients admitted to hospitals and clinics in Delhi has also gone up to 1,425.
Three deaths occurred on Sunday at the All-India Institute of Medical Sciences (AIIMS) with 92 new cases admitted to various other hospitals.
Of the patients affected, 930 are from Delhi and the rest from areas close to the national capital.
The latest dengue death was of 50-year-old Muzaffar Iqbal from Uttar Pradesh. He died on Sunday morning at AIIMS. The two others - Manoj Singh, 30, of Haryana and Kunwar Singh, 70, of Delhi - died earlier at the hospital.
The number of dengue cases at AIIMS, where most patients are converging, has increased with 61 new patients admitted even as 32 people were discharged.
"We are treating 192 patients," said AIIMS medical superintendent DK Sharma.
Delhi health ministry officials had inspected the worst affected areas along the Yamuna river on Saturday to ascertain the possible cause of the rise in the disease.
"We found that most of the cases reported are from colonies close to the river," said Delhi's Health Secretary DS Negi.
Dengue is caused by a virus spread by the female aedes aegypti mosquito that breeds in stagnant water. It is marked by high fever, skin rashes and joint pain. A sharp drop in blood platelet counts can prove fatal.
The disease has taken alarming proportions since the first week of September when the first deaths were reported and the cases started multiplying rapidly.
September to November each year are known to be favourable breeding months for the mosquito.
In other states too, dengue showed no signs of abating. The worst affected state, excluding Delhi, are Kerala (794), followed by Rajasthan (456), Gujarat (441), West Bengal (429), Uttar Pradesh (349), Tamil Nadu (307), Punjab (250), Maharashtra (240), Haryana (113), Karnataka (90) and Andhra Pradesh (33).
Another mosquito-borne viral disease, chikungunya, is causing a lot of worry. The total confirmed chikungunya cases are 1,610, while the number of suspected cases is at a high of 1.3 million.
According to the central health ministry, Maharashtra has 679 confirmed chikungunya cases, followed by Karnataka (294), Andhra Pradesh (248), Gujarat (145), Tamil Nadu (111), Madhya Pradesh (62), Kerala (38) and Pondicherry (9).