Skip to the story
All stories

UN climate chief warns extreme heat risks pregnancy

Survey of health professionals links rising temperatures to complications for mothers and newborns.

AI-assisted coverage comparison, editor-supervised · How this was made

Published
UNFCCC Executive Secretary Simon Stiell speaks on the day of the opening ceremony of the UN Climate Change Conference (COP30), in Belem, Brazil, on Nov 10, 2025. (File photo: Reuters/Adriano Machado)

What this story says

  • Extreme heat during pregnancy is linked to premature birth, stillbirth, low birth weight, and maternal complications, according to UN climate chief Simon Stiell.
  • A survey of 1,000 midwives and doctors across five countries found over two-thirds had witnessed heat-related complications in the last five years.
  • About a third of survey respondents reported cases of low birth weight, restricted growth, feeding difficulties, or dehydration due to extreme heat.
  • Around 33 countries recorded their hottest July on record this year, according to analysis of EU Copernicus climate data.

Who covered it

Left 36%(12)Centre 40%(13)Right 24%(8)

Percentages are shares of the 33 outlets carrying a published leaning rating. 18 of the 51 outlets we know ran this story carry no rating and are not counted in them. Coverage measured .

Trust

42/100

Craft

61/100

Hype

41/100

51 sources · methodology

Extreme heat is posing increasing risks to pregnant women and newborns, UN climate chief Simon Stiell has warned. He cited a survey of 1,000 midwives and doctors in the UK, Australia, India, Brazil, and Zimbabwe, commissioned by the Wellcome Foundation. More than two-thirds of these health professionals reported seeing complications caused by intense heat in the past five years. About a third of respondents noted cases of low birth weight, restricted growth, feeding difficulties, or dehydration resulting from extreme heat.

Stiell stated that rising temperatures mean rising danger in pregnancy, calling pregnancy and birth a new 'fault line' in the global climate crisis. Scientists note that climate change is intensifying extreme weather events. An analysis of data from the European Union's Copernicus climate observatory indicated that approximately 33 countries experienced their hottest July on record this year.

Disagreement on specific figures

One report stated that each one-degree Celsius rise in temperature contributes to a 5% increase in premature births and a 7% increase in gestational diabetes cases, according to data from a new study. This specific figure was not mentioned in other reports.

What the coverage left out

None of the left-rated digests mention the specific figure that each one-degree Celsius rise in temperature contributes to a 5% increase in premature births and a 7% increase in gestational diabetes cases, which was present in one right-rated digest.

Still developing. We have re-checked which outlets are covering this 6 times, most recently on 5 Oct 2026, 18:15, and will add the sides that appear.

How each side covered it

Our own reading of the reporting listed below, written from the outlets’ articles rather than quoted from them. The reasoning is set out on our methodology page.

Left

12 rated outlets

  • Left-rated reports highlighted that pregnant women and newborns are bearing the brunt of global warming but are being forgotten, with campaigners calling for action. Several reports focused on the UN climate chief's warning that pregnancy is a new fault line in the climate crisis, with one mentioning that women with 'no cool place to go' face rising risks. The finding that nearly all maternity workers surveyed had treated patients they believed were harmed by extreme heat was also noted.

Centre

13 rated outlets

  • Centre-rated reports led with the UN climate chief's warning that extreme heat is putting pregnant women and newborns at risk. They frequently cited the survey finding that 73% of maternal healthcare workers had seen heat-linked cases rise in the last five years. The fact that around 33 countries recorded their hottest July on record this year, according to EU Copernicus data, was also a common point.

Right

8 rated outlets

  • Right-rated reports focused on the UN's alert that extreme heat threatens the safety of pregnancy and birth. They mentioned that the UN warns extreme heat from climate change increases risks during pregnancy, including premature birth, infant death, low birth weight, and maternal complications. One report noted that high temperatures could increase multiple risks, ranging from premature births to the death of the newborn and congenital malformations.

Questions about this coverage

How did the left and right cover UN climate chief warns extreme heat risks pregnancy?
Of the 33 outlets on this story carrying a published leaning rating, 36% are rated left, 40% are rated centre, 24% are rated right. Those percentages are shares of the rated outlets, not of every outlet that ran it, which was 51. The sections above set out what each side emphasised, in its own terms.
Is UN climate chief warns extreme heat risks pregnancy left or right?
Neither side dominates it. Of the 33 rated outlets on this story, 36% are rated left, 40% are rated centre, 24% are rated right, and no side holds the 70% this site would want before calling a field one-sided. A story is not left or right in any case; the outlets that carried it are what carry ratings.
Is the coverage of UN climate chief warns extreme heat risks pregnancy biased?
UN climate chief warns extreme heat risks pregnancy is one event reported by 51 outlets, and this page does not rate the story as biased or unbiased. What it publishes is the spread: which outlets ran it, where named rating organisations place each of them on the spectrum, and what each side chose to lead with. A leaning rating describes an outlet's record over time, not this article, and the two should not be run together.
Which outlets covered UN climate chief warns extreme heat risks pregnancy?
51 that we know of, every one of them listed further up this page with a link to its own report and to what we hold on the publisher. Nothing here is a summary of somebody else's summary: the outlets are named so the original reporting can be read.
What are the main risks of extreme heat during pregnancy?
Extreme heat during pregnancy is increasingly linked to premature birth, stillbirth, low birth weight, and maternal complications. A survey of health professionals found that about a third of respondents reported seeing cases of low birth weight, restricted growth, feeding difficulties, or dehydration resulting from extreme heat.
What did the survey of health professionals find?
A survey of 1,000 midwives and doctors across the UK, Australia, India, Brazil, and Zimbabwe found that more than two-thirds had seen complications caused by intense heat in the past five years. Nearly all respondents reported caring for mothers or babies suffering the effects of extreme heat.
Which countries recorded their hottest July on record?
Around 33 countries recorded their hottest July on record this year. These countries spanned from western Europe to the Sahel and central America, according to analysis of data from the European Union's Copernicus climate observatory.

Read it at the source

51 outlets, grouped by the leaning a published rating gives them. Every headline links to the original; an underlined outlet name opens our profile of that publisher.

Left

12
Show 4 more

Centre

13
Show 5 more

Right

8

Not rated

18
Show 10 more

How did this read?

About the coverage, not about the story. We do not ask whether you agree with what happened — we have no honest use for that answer.

Simon Stiell on heat risks | MediaBias News