India is not unused to heat. But what is unfolding this April is something different in both scale and timing. As of 27 April, 96 Indian cities were among the world’s 100 hottest places. Orchha in Madhya Pradesh — a landscape ringed by forest and wildlife corridors — touched 41°C before ten in the morning. Temperatures across north and central India have been running 4 to 5 degrees above normal, and the India Meteorological Department has warned that above-normal heatwave days are likely right through to June across the east, centre, and northwest of the country. The peak, it says, is still ahead.

If it is affecting us this badly, consider what it is doing to them.

Birds are falling from the sky

The most immediate and visible toll is on birds. The Delhi Forest Department received around 50 distress reports in a single day last week — roughly 30 of them birds that had fallen mid-flight, overcome by heatstroke. The department has set up emergency water and shelter points at the Asola Bhatti Wildlife Sanctuary on the southern ridge. Wildlife SOS, which has been tracking heat-related rescues for years, notes that when ambient temperatures exceed 45°C, birds lose water through breathing and panting far faster than they can replenish it. Unlike mammals, birds cannot sweat. When their bodies can no longer hold the rising temperature, they simply stop.

This isn’t new to rescuers — but the numbers are. Black kites, house sparrows, Indian robins, tailorbirds, barn owls, grey francolins, peacocks, quails: the list of species turning up at rescue centres reads like a checklist of India’s most common birds, which is precisely the point. These are not rare or isolated casualties. They are the fabric of India’s everyday wild.

The phenology problem: when seasons stop speaking the same language

Beyond the immediate, there is a slower and more damaging process under way. Ecologists call it phenological mismatch — when the seasonal cues that plants and animals have evolved to respond to fall out of sync with each other.

In the Himalayas, a University of Kashmir study monitoring over 200 plant species has found flowering happening 20 to 25 days earlier than usual this year. Species like Viburnum grandiflorum and several Narcissus varieties are blooming in conditions they were never calibrated for. In central India, ornithologist Satish Pande of the Ela Foundation reports that nesting among raptors — hawk eagles, Bonelli’s eagles, short-toed snake eagles — was delayed until the end of January this year, when it normally begins in December. The Flame of the Forest and red silk cotton trees bloomed early, in March rather than April. By the time chicks hatch, the flowering is already done. The food window has closed.

This is how heat stress translates into something more permanent: not just deaths, but mismatched timing that compounds across generations.

Water, and the animals that depend on it

For larger mammals, the crisis is centred on water. Wildlife SOS has documented how severe heatwaves create drought-like conditions across wild habitats — tigers, leopards, civets, and foxes all being pushed toward the same dwindling water sources. Elephants, which require enormous volumes of freshwater daily, face disruptions not just to their hydration but to their migration patterns and breeding behaviour when water sources shift or dry up entirely.

This convergence at stressed water holes carries its own danger. Animals that would never normally interact are forced into proximity. And as water sources inside forests shrink, pressure builds at the forest edge — which is also where human settlements are. The consequence, almost inevitably, is conflict.

The Himalayas compound the problem further upstream. Snow levels across the region are currently nearly 28% below normal — the lowest in over two decades, according to the International Centre for Integrated Mountain Development (ICIMOD). Himalayan snowmelt feeds roughly a quarter of the water flow in twelve major river systems across South Asia. Less snow this winter means less water in forest streams this summer, precisely when the forests need it most.

Reptiles heading in, forests heading out

Reptiles, being ectotherms, respond to extreme heat by going underground or seeking shade — which increasingly means venturing into human spaces. Wildlife SOS rescue logs from recent heatwave years show a spike in snake and monitor lizard call-outs from homes, apartments, and storage areas across north India. As forest cover degrades and the shade it provides disappears, reptiles have fewer options in the wild.

The forests themselves are changing. Early-season forest fires — some natural, some set — have been compounding the stress. Once a fire moves through understorey vegetation, it removes both food and cover for ground-dwelling birds and small mammals at precisely the moment they most need it. Water bodies that normally persist into May and June are drying weeks earlier than expected, reducing wetland habitat for resident birds and forcing early departure among those that winter here.

The season most at risk

It is worth noting when all of this is happening. April and May are not merely hot months — they are breeding months for a large number of Indian species. For birds especially, this is when eggs are in nests and chicks are newly hatched. Heat at this stage is not just uncomfortable. It can be fatal for an entire cohort. A bad heatwave in April can hollow out a species’ reproductive success for a full year.

Carbon Brief’s analysis suggests 2026 could be the second hottest year on record globally. India is already carrying that heat now, in April, with the worst months still ahead.

What can be done

Wildlife SOS recommends placing shallow clay or ceramic water bowls in shaded outdoor spaces during peak heat — refilled regularly through the afternoon. It is a small act, but in urban and semi-urban areas, where the forest department cannot reach, it is the difference a bird makes between collapse and survival.

Forest departments in several states have set up water stations inside reserves. The question is whether the scale matches the need. In a country where 96 cities are simultaneously among the world’s hottest, the answer is almost certainly: not yet.

The heatwave will pass. But the conditions that produced it — early onset, unusual intensity, longer duration — are now the new normal. India’s wildlife, which has been navigating this landscape for millennia, is adapting. The question is whether it can adapt faster than the temperature is rising.