Police Say the Search for Savannah Guthrie's Mom is a 'Race Against Time'

The search for Savanah Guthrie's mom Nancy Guthrie is a "race against time" — and there's a lot at stake.

Nancy, 84, has been missing for more than 48 hours. In a February 3 interview on Today, Pima County Sheriff Chris Nanos told NBC News that tensions are rising. As he put it, "It is a race against time, and I hope that window hasn’t closed."

Nancy, a mother of three, was reported missing over the weekend. Authorities have worked tirelessly to trace her location, but so far their efforts have not yielded results.