Pregnancy Health Risks Linked to Heat Waves as Temperatures Rise

  • Study shows sultry weather raises threat of severe ailments
  • Research hints at dangers among low-income population

Emergency medical technicians respond to a pregnant woman suffering from dehydration in Eagle Pass, Texas. 

Photographer: Brandon Bell/Getty Images
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Exposure to extremely hot weather raises pregnant women’s risk of severe health complications, researchers said in a study coming at the tail end of the warmest summer on record.

High outdoor temperatures during pregnancy were associated with a 27% increase in risk for such complications as sepsis, a potentially lethal reaction to infection, or dangerous increases in blood pressure, according to an 11-year review of more than 400,000 pregnancies in a Southern California health system.