Axios

Severe storms are sweeping the U.S. South and Midwest, spawning damaging tornadoes and causing flooding in multiple states into Thursday, when at least four people were reported dead.

The big picture: The National Weather Service warned the "powerful Spring storm system will bring a barrage of life-threatening weather hazards" to parts of the Lower Ohio Valley and Mid-South Thursday through at least Saturday.

Unmarried older adults in the U.S. were less likely to develop dementia than those who were married, according to a new study of 24,000 Americans.

Why it matters: The finding seems to contradict the long-held belief that marriage is associated with better cognitive health and longevity.