Dengue cases rise in Delhi: Expert explains warning signs parents should not ignore

Delhi has recorded its highest number of dengue cases in April in the last five years, raising fresh concerns among doctors and public health experts. The rise is being linked to changing weather patterns, increasing temperatures, waterlogging and rapid urbanisation, all of which are creating ideal breeding conditions for mosquitoes much earlier than usual.

Health experts now warn that dengue is no longer just a monsoon disease. Instead, it is becoming a year-round health threat, especially for children, whose immunity and recovery systems are often more vulnerable to severe infections.

Dengue is no longer limited to the rainy season

Traditionally, dengue cases used to rise mainly during the monsoon and post-monsoon months. However, doctors say climate change and fluctuating temperatures are changing mosquito breeding patterns across Indian cities, including Delhi.

The Aedes aegypti mosquito, responsible for spreading dengue, now survives in warmer conditions for longer periods. Even small amounts of stagnant water in coolers, pots, AC trays or construction sites can become breeding grounds within days.

According to recent data, Delhi reported 52 dengue cases in April 2026, the highest April figure in the past five years. Medical experts believe early spikes may indicate a longer and more intense dengue season ahead.

Why children are more vulnerable to severe dengue

Doctors say children under 15 years of age form a large proportion of dengue cases in India every year. Younger children, especially below the age of five, remain at higher risk because their immune systems are still developing.

According to paediatric specialists, children’s blood vessels are more delicate, which increases the risk of complications such as:

• Plasma leakage
• Internal bleeding
• Sudden drop in blood pressure
• Severe dehydration
• Dengue shock syndrome

Children also struggle to communicate symptoms clearly, which may delay diagnosis and treatment.

Repeat dengue infections can become more dangerous

One major concern among doctors is repeat dengue infection. Dengue viruses exist in four different strains, meaning recovering once does not guarantee lifelong protection.

Experts explain that a second infection caused by another strain can sometimes become more severe due to a process called antibody-dependent enhancement (ADE). In such cases, the body’s previous antibodies may react abnormally, increasing inflammation and complications.

This is one reason why parents should never ignore fever symptoms, even if the child had dengue before.

Early dengue symptoms parents should watch carefully

In the beginning, dengue symptoms may appear similar to a common viral fever. However, doctors warn that the condition can worsen rapidly within two to five days.

Common early symptoms include:

• High fever
• Severe headache
• Pain behind the eyes
• Muscle and joint pain
• Weakness and fatigue
• Nausea or vomiting
• Skin rashes

Because symptoms overlap with viral infections, many families delay testing during the early stage.

Warning signs that need immediate medical attention

Doctors strongly advise parents not to ignore the following symptoms, especially after fever begins to settle:

• Continuous vomiting
• Severe abdominal pain
• Bleeding gums or nose
• Blood in vomit or stool
• Difficulty breathing
• Extreme drowsiness or restlessness
• Cold hands and feet
• Sudden weakness or fainting

These may indicate severe dengue or dengue haemorrhagic fever, which requires urgent medical supervision and hospital care.

Why obesity and existing health conditions matter

Health experts say obesity and underlying illnesses may increase the risk of complications in children with dengue.

Children with conditions such as:

• Asthma
• Diabetes
• Nutritional deficiencies
• Weak immunity
• Metabolic disorders

may take longer to recover and require closer monitoring during infection.

Simple precautions families should follow at home

Doctors emphasise that prevention remains the strongest defence against dengue, especially because there is no specific antiviral treatment for the disease.

Important dengue prevention tips:

• Do not allow water to collect in coolers, buckets or plant pots
• Clean AC trays and water containers regularly
• Use mosquito repellents safe for children
• Dress children in full sleeves and full pants outdoors
• Install window screens or mosquito nets
• Keep surroundings clean and dry
• Avoid outdoor play near stagnant water or construction sites

Even small household negligence can increase mosquito breeding within days.

Why early diagnosis matters

Doctors say dengue complications often develop suddenly after the fever phase, which makes early testing extremely important.

Timely blood tests, hydration and monitoring can prevent severe complications and reduce hospitalisation risks. Parents are advised not to self-medicate children with painkillers like ibuprofen without consulting a doctor, as certain medicines may increase bleeding risk.

Dengue awareness is now more important than ever

The sharp rise in Delhi’s dengue cases highlights how changing climate conditions are reshaping public health risks in India. Experts believe awareness, prevention and early medical attention will become increasingly important in protecting children during extended dengue seasons.

Doctors stress that parents should stay alert even before the monsoon officially begins because mosquito breeding and transmission are now happening much earlier than expected.