According to reports a 41-year-old woman and two boys of 14 and seven died of dengue on Wednesday.
Reports said government-run hospitals are overflowing with dengue patients. They have been ordered t increase beds by 1,000 by Sunday.
The Delhi government has also asked private hospitals to buy more beds and hire more doctors, nurses and paramedics.
After two boys who were allegedly denied beds died last week, the government has warned private hospitals that they could lose their licence for turning patients away.