Over 300 cases of dengue have been detected so far this month, marking an increase of more than 100 per cent over the August figure of 142.
First two weeks of September have registered 304 cases, taking the total of dengue cases so far in the city to 466 in 2013, according to an MCD report released yesterday.
"Dengue cases generally peak during September and intermittent rains so far made the situation conducive for breeding of related mosquitoes and hence the manifold rise.
"Cases are likely to increase from here and peak during the month end," North Delhi and East Delhi municipal corporations Public Relations Officer Yogendra Singh Mann said.
There were only 20 cases of dengue from January to July, while March and May posted none.
For Delhi region, in the January-September period, 446 dengue cases were reported, while 20 were reported from Uttar Pradesh, Haryana and other states, the report said.
While figures for various corporations are North (234), South (136) and East (49), 27?cases were reported from regions in Delhi outside the jurisdiction of MCD.
Most number of cases came were from Rohini (73) and Narela (73) in the North Zone.
Malaria cases meanwhile have fallen to 8 so far this month against 28 in August.
The number of legal notices issued on detection of mosquito breeding on premises from January to September stood at 89,453 as compared to 5,925 last year over the same period, the report said.
"We are continuing with our anti-larval routines with Malaria inspectors working in each zones. Our domestic breeding checkers are going from door to door to alert people to take precautionary and preventive measures.
"Fumigation is being carried out and camps are being organised regularly to sensitise people. MCD staffs are also going on vehicles alerting residents and announcing preventive measures to be taken," he said.
"We are expecting a dry spell and temperature change might affect breeding again. So, we are on alert. Also, we have run terminator trains in uninhabited areas, where water stagnation occurs and we will be spraying fumes," Mann said.