Michigan is the hardest hit among the 31 states reporting cases, with more than 2,600 people sickened.
The veteran broadcaster said part of a day remains "a big, black hole."
Ovarian cancer progresses quietly, often leaving patients with no warning.
For some patients, GLP-1 medications may reduce thirst.
ABC News' Medical Correspondent Dr. Darien Sutton reports on where the parasitic infection is spreading, what to know about the symptoms and how to protect yourselves.
The CDC says pregnant women are at greater risk of heat-related illness.
