The first official death due to dengue was a nine-year-old girl from Sangam Vihar who succumbed at the All India Institute of Medical Sciences on September 24.
A 38-year-old man too had succumbed at the Delhi government-run Lok Nayak Hospital on Sunday morning but the civic agency has not registered it as the second dengue death because the deceased was a resident of Loni near the Delhi-Uttar Pradesh border.
Dengue serology report is also awaited of a man who died in New Delhi's Safdarjung Hospital on Monday.
Cases of dengue are also being reported from the campuses of premier educational institutions such as the Jawaharlal Nehru University (JNU) and the Indian Institute of Technology (IIT).
"I know a couple of boys who were diagnosed with dengue and went back home as they had high fever and severe body ache. It's a huge campus and you cannot exactly say where you were bitten by mosquitoes," said a student from JNU.
Cases of dengue have seen a sudden spurt owing to the ideal post-monsoon weather for mosquito breeding.
Top private hospitals alone have reported nearly five times more cases than claimed by the civic agencies.
Last year, the Capital saw 230 cases of dengue, including eight originating from outside Delhi, and three deaths.