Why Dog Bites Increase In Summer: Vet Decodes Heat-Driven Aggression In Strays, What To Do, And Pack Behaviour Explained

Last Updated:March 23, 2026, 16:38 IST

Dog bite cases often rise in summer. After the shocking Pune incident, a vet explains how heat, stress, and human behaviour trigger aggression in strays and how to avoid danger.

What started as a regular walk home in Pune took a tragic turn, spotlighting a troubling pattern: Are rising temperatures fuelling aggression in stray dogs, and why do they attack in packs?

A tragic incident on the Pune-Nashik highway in the early hours of Monday, March 16, 2026, has reignited concerns around rising dog bite cases. A 32-year-old woman, Shobha Waghmare, lost her life in a brutal stray dog attack.

While such incidents are often dismissed as rare, experts say it is part of a seasonal surge, often linked to warmer temperatures, increased human interaction, and heightened stress levels among stray animals.

The death of Waghmare shocked residents. According to TOI, police reports revealed that CCTV footage captured six stray dogs surrounding and attacking her, despite her attempts to fend them off.

The brutality of the impact, which lasted nearly 15 minutes, highlights that stray dog aggression, particularly in packs, can escalate rapidly and become fatal. But what makes such incidents more likely during summer?

Do Dog Bites Spike During The Summer?

Multiple reports and studies suggest that dog bite incidents increase significantly during warmer months. A 2025 study published in PubMed Central examined dog bite cases reported at a tertiary care hospital in Mumbai and found a clear correlation between rising temperatures and increased bite incidents.

Another 2022 study based on a retrospective analysis used meteorological data and statistical correlation methods to establish that environmental factors, especially heat, play a crucial role in influencing dog behaviour.

It also reinforced a broader concern: dog bites are a major public health issue in India, which accounts for nearly 36% of global rabies deaths, with an estimated 18,000-20,000 fatalities annually.

Why Summer Makes Dogs More Aggressive

Veterinary experts say the spike in dog bites during the summer season is not coincidental or random; it is deeply linked to physiological stress and environmental factors.

Dr Varun Mehta, Chief Veterinarian and Founder of Pet Ministry, explains,

“Summer months are particularly stressful for dogs due to heat, dehydration, and reduced access to food and water. These conditions can make them more irritable and reactive."

Unlike humans, dogs cannot regulate body temperature efficiently. Prolonged exposure to heat leads to discomfort, irritability, and fatigue, conditions that can lower their threshold of aggression.

At the same time, summer brings increased human activity outdoors. Parks, streets, and open spaces become busier, leading to more frequent human-dog interactions. As Dr Mehta adds, “When dogs feel threatened, anxious, or defensive in such situations, the likelihood of bite incidents rises significantly."

Hidden Stressors Influencing The Attacks

Stray dogs, in particular, face a layer of stress during summer. Limited access to water and food, shrinking spaces, and competition for survival resources intensify their territorial instincts.

Dr Mehta notes, “Territorial instincts tend to intensify during summer due to limited resources such as water, food, and shaded resting areas. Dogs become more protective of whatever resources they can secure."

This also means that human actions that feel harmless, like walking too close, attempting to shoo them away, or unintentionally entering their personal space, can trigger defensive aggression.

Common Triggers Behind Stray Dog Attacks

According to experts, understanding the key factors behind stray dog attacks is crucial. Some of the most common triggers include:

• Direct eye contact: Often perceived as a challenge or threat
• Sudden movements: Running, waving hands, or throwing objects
• Loud noises or shouting: Can startle or provoke anxious dogs
• Territorial intrusion: Entering spaces dogs consider their own, such as under parked vehicles or near feeding spots
• Resource competition: Interfering with their access to food, water, or shelter

Dr Mehta explains, “Stray dogs typically react when their sense of safety is compromised. Sudden human entry into their perceived territory can trigger defensive aggression."

Why Do Dogs Attack In Packs?

The Chakan incident raised another important question: why do dogs attack in packs? The answer is what experts call ‘Pack Behaviour.’

Dogs are inherently social animals with a natural instinct to form groups for survival. In the wild, pack behaviour helps them hunt, protect territory, and defend against threats. This instinct remains even in urban stray populations.

When one dog from the pack senses a threat and reacts, the others follow, a phenomenon known as social facilitation. In high-stress conditions like heat, hunger, or fear, this behaviour becomes more pronounced.

A lone dog may bark or retreat, but a pack is more likely to escalate into an attack, especially if they sense vulnerability. In the Pune case, CCTV footage shows a similar pattern: the dogs surrounded the victim, coordinated their movements, and attacked collectively.

How Dogs Interpret Human Behaviour

One of the most misunderstood aspects of dog aggression is how dogs read human actions. According to Dr Mehta, “Dogs interpret human behaviour based on past interactions and learned experiences. Sudden movements, direct staring, or loud shouting may be perceived as threats."

For example, staring directly into a dog’s eyes can be seen as dominance or aggression, running away may trigger a chase instinct, raising hands or throwing stones can escalate fear-based aggression. This explains why attempts to scare away dogs can sometimes backfire, as seen in the Pune incident.

The Role Of Climate Change

Emerging research suggests that climate change may also be influencing animal behaviour, including that of stray dogs. Rising temperatures, changes in food availability, and habitat disruptions are increasing stress levels among animals.

The PubMed Central study notes that such environmental shifts can alter aggression patterns and territorial instincts. Additionally, warmer weather leads to more human outdoor activity, increasing the likelihood of encounters with stray dogs.

The combination of stressed animals and increased human presence creates a storm of conflict.

A Seasonal Risk: Children And Dog Bites

Summer vacations mean children spend more time outdoors, often unsupervised. This also increases the risk of dog bites, as children may unknowingly provoke dogs by approaching unfamiliar dogs, running or screaming near them or attempting to pet or feed them.

Without understanding canine behaviour, such actions can trigger defensive reactions. Experts stress the importance of educating children about safe interactions with animals, especially during summer.

Can Coexistence Be Possible?

Despite the fear surrounding such incidents, experts emphasise that not all stray dogs are aggressive.

Dr Mehta offers a balanced perspective: “Stray dogs are capable of being loyal and gentle companions when treated with empathy. Most aggression stems from fear, trauma, or survival instincts."

He also adds that consistent, positive interactions, such as regular feeding and non-threatening behaviour, can build trust over time.

The World Health Organisation advocates for a “One Health" approach, recognising the interconnectedness of humans, animals, and the environment.

Addressing stray dog aggression requires:

• Better waste management to reduce food scarcity
• Urban planning that considers animal habitats
• Sterilisation and vaccination programs
• Public awareness campaigns

The PubMed Central study underscores the need for more research into the link between environment, climate, and dog behaviour to develop effective prevention strategies.

Rising Heat, Rising Risk

The tragic death in Pune serves as a reminder that dog bites are not random events; they are often the result of a complex interplay of environmental stress, human actions, and animal behaviour.

As temperatures rise, so does the need for precaution and awareness. Understanding why dogs behave the way they do, especially in high-stress conditions, may be the first step in preventing such tragedies and ensuring safer co-existence between humans and animals.

News explainers Why Dog Bites Increase In Summer: Vet Decodes Heat-Driven Aggression In Strays, What To Do, And Pack Behaviour Explained