Rescuers and relatives searched knee-deep in water for the body of one-year-old Zara. She'd been swept away by flash floods; the bodies of her parents and three siblings had already been found days earlier.

We suddenly saw a lot of water. I climbed up to the roof and urged them to join me, Arshad, Zara's grandfather, said, showing the BBC the dirt road where they were taken from him in the village of Sambrial in northern Punjab in August.

His family tried to join him, but too late. The powerful current washed away all six of them.

Every year, monsoon season brings deadly floods in Pakistan. This year it began in late June, and within three months, floods had killed more than 1,000 people. At least 6.9 million were affected, according to the United Nations agency for humanitarian affairs, OCHA.

The South Asian nation struggles with the devastating consequences of climate change, despite emitting just 1% of global greenhouse gas emissions. To witness its effects, the BBC traveled from the mountains of the north to the plains of the south. In every province, climate change was having a different impact, but the poorest suffered the most.

In villages and cities, millions have settled around rivers and streams, areas prone to flooding. Pakistan's River Protection Act - prohibiting building within 200 ft (61m) of a river - was crafted to mitigate such risks, but many find it too costly to relocate.

The floods have displaced over 2.7 million people in Punjab, damaging more than a million hectares of farmland and overwhelming the country's breadbasket. In Lahore, the disparity in impacts on wealthier and poorer communities offers a stark portrayal of injustice as the most vulnerable struggle to recover.

Yasmeen Lari, an architect, has designed climate-resilient houses using sustainable materials, but her ideas underline the reality that it's about saving lives. With each passing year, Pakistan faces the growing and alarming challenges of climate change.