Shortages are in the news again! Here’s why the supply of blood, water and helium are at concerningly low levels. Fact checking by Sierra Juarez (npr.org/people/1268825622/sierra-juarez) . Your Next Listen  — How Colorado towns are trying to get some water certainty (lnk.to/UDxNGE) Connect with The Indicator — Sign up for The Indicator’s weekly newsletter (npr.org/indicatornewsletter) ! — Buy the Planet Money book (lnk.to/i3AukBdDWE) — Find our socials, YouTube and more (linktr.ee/indicator_npr) ! Support public media with NPR+ and enjoy perks for over 25 podcasts like this one. This show’s perks include sponsor-free listening. Learn more at plus.npr.org (plus.npr.org) . See pcm.adswizz.com (pcm.adswizz.com) for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy (npr.org/about-npr/179878450/privacy-policy)