February 23, 2017, 12:40:04 PM EST
Outdoor seasonal allergies are a problem for millions around the globe. more
After record-shattering warmth baked the mid-Atlantic and Northeast on Friday, much colder air is set to make a comeback later this weekend.
A widespread outbreak of severe weather is threatening a large portion of the Midwest.
Flooding created chaos for hundreds in California this week, while a deadly wind storm slammed the United Kingdom.
A line of strong thunderstorms will march across the northeastern United States into Saturday night with the potential for flash flooding and damaging wind gusts.