INSIGHT-In hottest city on Earth, mothers bear brunt of climate change

(Repeats for additional subscribers)

* Jacobabad in Pakistan hits 51 Celsius (124 Fahrenheit)

* Women especially vulnerable to extreme heat - studies

* Pregnant women at even higher risk, scientists warn

* WIDER IMAGE photo essay: https://reut.rs/3xobX8A

By Charlotte Greenfield and Gloria Dickie

JACOBABAD, Pakistan, June 14 (Reuters) - Heavily pregnant Sonari toils under the burning sun in fields dotted with bright yellow melons in Jacobabad, which last month became the hottest city on Earth.

Her 17-year-old neighbour Waderi, who gave birth a few weeks ago, is back working in temperatures that can exceed 50 Celsius (122 Fahrenheit), with her newborn lying on a blanket in the shade nearby so she can feed him when he cries.

"When the heat is coming and we're pregnant, we feel stressed," said Sonari, who is in her mid-20s.

These women in southern Pakistan and millions like them around the world are at the searing edge of climate change.

Pregnant women exposed to heat for prolonged periods of time have a higher risk of suffering complications, an analysis of 70 studies conducted since the mid-1990s on the issue found.

For every 1 degree Celsius in temperature rise, the number of stillbirths and premature deliveries increases by about 5%, according to the meta-analysis Global Consortium on Climate and Health Education at Columbia University, which was carried out by several research institutions globally and published in the British Medical Journal in September 2020.

Cecilia Sorensen, director of the Global Consortium on Climate and Health Education at Columbia University, said the unfolding impact of global warming on the health of women was "highly underdocumented", partly because extreme heat tended to exacerbate other conditions.

"We're not associating health impacts on women and often times it's because we're not collecting data on it," she said. "And often women in poverty are not seeking medical care."

"Heat is a super big deal for pregnant women."

Women are especially vulnerable to rising temperatures in poor countries on the frontlines of climate change because many have little choice but to work through their pregnancies and soon after giving birth, according to interviews with more than a dozen female residents in the Jacobabad area as well as half a dozen development and human rights experts.

Further adding to the risks, women in socially conservative Pakistan - and many other places - typically cook the family meals over hot stoves or open fires, often in cramped rooms with no ventilation or cooling.