Mumbai food poisoning tragedy: Can watermelon become poisonous? Experts separate fact from fear

A late-night meal in Mumbai has turned into a disturbing tragedy, sparking fear and speculation around a common summer fruit - watermelon. Four members of a family died within hours of falling ill, in what police suspect to be a case of food poisoning. The incident, reported from the Pydhonie area, has drawn attention online, particularly over the watermelon they consumed shortly before their symptoms began. 

According to officials, 40-year-old Abdullah Abdul Kadar, his wife Nasreen (35), and their daughters Ayesha (16) and Zainab (13) had gathered with relatives for dinner around 10:30 pm on Saturday, where biryani was served. After returning home, the family ate watermelon around 1 am. By 5 am, all four developed severe vomiting and diarrhoea. Despite initial treatment and being rushed to the hospital, their condition rapidly worsened. Zainab died around 10:15 am, followed by her mother and sister, while Abdullah succumbed later that night. 

As investigations continue, with food samples and post-mortem reports under examination, the case has triggered a surge of social media claims linking watermelon to serious health reactions.  

One such post on X describes a similar episode involving the user’s sister, who reportedly developed “a severe urticarial rash over her lips and face” after eating watermelon. Her condition quickly progressed to “hoarseness of voice… followed by breathlessness,” the user wrote, adding that her oxygen levels began dropping before emergency treatment helped stabilise her. The post ends with her saying, “Aaj mera roza tha, aur maine iftar ke bad sirf tarbooz khaya hai.” (I was fasting today, and after iftar I only ate watermelon).  

With such claims gaining traction, questions are emerging: Can eating watermelon at night be harmful, or are these isolated medical incidents being misunderstood? We spoke to Dr Aravinda S N, Lead Consultant - Internal Medicine, Aster RV Hospital, Bengaluru, to separate fact from fear. 

Can watermelon turn toxic, or is contamination the real risk? 

Dr Aravinda S N said watermelon, by itself, is not toxic and is generally a safe, hydrating fruit when consumed fresh. The concern, he explained, lies in contamination during handling and storage rather than the fruit’s natural properties. 

“Once cut, watermelon becomes highly vulnerable because of its high water and sugar content, which creates an ideal environment for bacteria like Salmonella and E. coli to multiply - especially if left at room temperature,” he said. 

He added that poor hygiene during cutting can also introduce risk. “Unclean knives or surfaces can transfer microbes from the rind, which may carry dirt or pesticide residue, to the edible flesh,” he noted. 

According to him, improper storage further increases the danger. “Cut watermelon should be refrigerated and consumed within a few hours. In warm climates, it spoils quickly,” he said, adding that contamination from unsafe water, pesticides, or artificial ripening agents can also make it unsafe. 

He emphasised that in severe cases, rapid onset of symptoms is usually linked to foodborne toxins or bacterial contamination. “It’s not that the fruit becomes poisonous on its own,” he said. 

What are the common ways watermelon can get contaminated, and how can people safely consume it?

Dr Aravinda explained that contamination often begins at the surface. The outer rind can carry dirt, pesticide residue, and microbes, which may get transferred inside if the fruit is not washed before cutting. 

“Using unclean knives, chopping boards, or even hands can introduce bacteria like Salmonella and E. coli,” he said. “After cutting, watermelon becomes highly perishable and should not be left out in the heat.” 

He flagged pre-cut fruit sold on the street as particularly risky. “These slices are often exposed to dust, flies, and polluted air, and may be handled without proper sanitation,” he said. 

For safe consumption, he advised simple precautions: “Wash the whole fruit before cutting, use clean utensils, and either eat it fresh or store it in a covered container in the refrigerator.” He also warned against consuming spoiled fruit. “A sour smell, slimy texture, or unusual taste are clear signs it should be discarded,” he said. 

Is there any scientific basis to the belief that eating watermelon at night can cause illness?

Dr Aravinda said there is no scientific evidence to suggest that eating watermelon at night is inherently harmful. The fruit, he explained, is easy to digest and can be consumed at any time of the day. 

“There’s nothing about nighttime that makes watermelon dangerous. This idea is largely based on traditional beliefs rather than medical evidence,” he said. 

However, he noted that certain discomforts may be misinterpreted as “harm.” “Because watermelon has very high water content, eating large quantities late at night may lead to bloating or frequent urination. Some people with sensitive digestion may also feel mild gastric discomfort,” he explained. 

He stressed that timing is not the real issue; storage is. “If cut watermelon has been left unrefrigerated for several hours, bacteria can grow. That’s what can make people sick, not the fact that it was eaten at night,” he said. 

“The key is freshness and hygiene,” he added. “Contamination and improper storage, not timing, are what pose the real risk.” 

Expert insight into the Mumbai case

For this case in particular, Dr Pravindhira S.N, Consultant in Surgical Gastroenterology & Hepato-Pancreato-Biliary Surgery at SRM Global Hospital, Chennai, said the pattern points towards foodborne poisoning from a common source.

He explained that the rapid onset of severe vomiting and diarrhoea suggests toxin-mediated food poisoning. “When symptoms develop within a short duration, it is often due to preformed toxins already present in the food,” he said. 

According to him, there are two likely sources in this case: the biryani consumed at the gathering or the watermelon eaten later. However, he noted that clustering limited to four family members makes the latter more probable. “If the biryani was contaminated, others who ate the same meal should also have fallen ill,” he said, adding that watermelon, if cut and left exposed, can allow bacteria to multiply and produce toxins. 

He stressed that there is no scientific basis to link the timing of consumption with illness. “Eating watermelon at night does not cause such symptoms. But eating contaminated food, at any time, can,” he clarified. 

Dr Pravindhira added that the severity of the outcome could be linked to dehydration caused by persistent vomiting and diarrhoea. He also cautioned that even seemingly fresh fruit can be unsafe if exposed to contamination or chemicals. “A fresh watermelon is safe, but once contaminated or improperly stored, it can become dangerous,” he said. 

Emphasising prevention, he advised strict hygiene and storage practices. “Always consume freshly cut fruit, store it in airtight containers if needed, and discard it if there is any change in smell, taste, or texture,” he said, adding that risks of food poisoning tend to rise in summer due to faster spoilage.

This story is done in collaboration with First Check, which is the health journalism vertical of DataLEADS