Washington is bracing for more flooding beginning Monday, after historic inundation last week led to thousands of evacuations and prompted the Gov. Bob Ferguson to declare a State of Emergency.

A Level 2 out of 4 flash flood threat remains for Northern California through Tuesday, as the first of a series of storms begins to pick up where this weekend's atmospheric river left off. It is ...

The Nile was the lifeblood of ancient Egypt, and its inundation was the pivotal annual event in Egyptian civilization. Every summer, between May and September, the river gradually swelled until it ...

Since Philadelphia is arranged on a grid system, the mostly one-way roads are easy to navigate. Helpful maps are posted along street corners across the city – watch for the "Walk! Philadelphia" signs ...

Mutations in the NF1 gene lead to neurofibromatosis type 1, which often leads to bone abnormalities and spine deformity. Efforts to treat or even prevent the disease have been stymied by lack of ...