The acrid, chemical smell in wildfire smoke isn't your imagination — it's benzene and formaldehyde, and sometimes it's literally burning plastic.

Before a single drop of storm runoff arrives, California dam operators are already emptying space for it. New atmospheric-river forecasting means they can now time that release to the hour.

A new UN report concedes the Paris Agreement's 1.5°C limit will be crossed within years. What happens next is called "overshoot" — and it will shape climate policy for the rest of the century.

After the 2025 Los Angeles fires, California's insurer of last resort needed a $1 billion rescue, its first since 1993. Homeowners who never filed a claim are footing part of the bill.

Record rain overwhelmed small-town Indiana this month. The bigger story is a stormwater system that earned a D on its last national report card, and a $115 billion repair bill nobody's paying.

It looks like hail and sounds like hail — but squeeze it, and graupel crumbles like styrofoam because it forms almost the opposite way.

When a wildfire burns hot enough, it can build a genuine thunderstorm above itself, one that sparks new fires with dry lightning and can loft smoke into the stratosphere for months.

The Weather Channel has named winter storms for 14 seasons running, using a population-and-area formula it built itself. The National Weather Service — and the AP — still won't use the names.

Shelters are filling and the ports are shut as a Category 5-equivalent storm bears down on Guam and the Northern Mariana Islands, with landfall due Monday.

Six to seven inches of rain in hours killed at least four people and forced dozens of water rescues across central Kentucky.

A record-breaking heat dome that has killed dozens in Western Europe is sliding east, with Germany and Poland bracing for the weekend peak.