A chronic health situation may worsen or, more likely, a crisis may happen suddenly with a call in the middle of the night. Millions of Americans then find themselves as a caregiver to a loved one, and as people live longer, as well as farther away from their families, healthcare providers, healthcare systems, policy makers, and employers need to change how they recognize and respond to the growing numbers of caregivers taking care of older adults, experts in the field said.