National Environment Why Heat Waves Are More Challenging For Pregnant Women 4:26pm July 20, 2018 by Courtney Collins Environment National Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2018 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered National What Netflix's WWE deal means for the future of live sports TV by Darian Woods Arts Up all night for Van Gogh: The National Gallery stays open for 24 hours by Tinbete Ermyas 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate