A new study suggests that long periods of cold, dry weather helped drive epidemics in ancient and pre-modern China

As climate change fuels large wildfires, the pollution they're releasing is making Americans sick and undermining decades of progress in cleaning the air.

Near record stretch of foggy days at Ted Stevens International Airport.

This is the second longest period of visibility remaining this low at the Anchorage Airport.

More open water on rivers and lakes that add to the near-ground moisture.

We put out the call for images of storm damage across the state Monday morning and our readers answered with some great shots.

Drought, causing low waters in Goodnews River, no blackberries, and early cool weather.

The wind known as the Diablo is picking up again, the air is dry, there is no rain in sight and the killer wildfires that have scorched the wine country of Northern California remain almost completely uncontained. Officials warned Wednesday that some of the big fires could merge. Amid these grim bulletins, the huge utility company PG&E acknowledged that the extreme winds late Sunday and early Monday had knocked trees into power lines in conditions conducive to wildfires.

When Hurricane Irma ravaged the Caribbean island of Barbuda, the storm left it uninhabitable." And, now, for the first time in 300 years, no one lives there.

Gas bubbles from waters filling crater hole on Yamal peninsula two months after volcanic-style explosion in thawing permafrost.

Residents are now being asked to stay away from Nahanni Butte, N.W.T., after being forced out Thursday night by a forest fire burning close to the community.

Environment Canada says these smoky conditions could remain until Wednesday.

The smoke from massive wildfires hangs like fog over large parts of the U.S. West, an irritating haze causing health concerns, forcing sports teams to change schedules and disrupting life from Seattle to tiny Seeley Lake, Montana.

Los Angeles County's La Tuna Fire is one of 29 burning across the state, and "is the largest fire in the history of L.A. city," Mayor Eric Garcetti said.

The Canadian Red Cross says an additional 1,500 people from the Garden Hill First Nation in Manitoba have been given evacuation orders due to wildfire smoke in the Island Lake area.

UPDATE 3:55 P.M. With assistance from several supporting agencies, the Kittitas County Sheriff’s Office completed evacuation notices mid-day Saturday in the Roslyn, Ronald and Lake Cle Elum areas.

Looking around the deserted plaza in front of the Sandman Centre arena in Kamloops on Monday, it’s hard to believe that last month it was crammed with thousands of people who were looking for help after being forced from their homes by wildfires.

Several factors have conspired to make Hurricane Harvey so destructive in Texas, and warming temperatures are likely part of the problem.

Study calculates energy Harvey took from the ocean, shows human role.

The remnants of Harvey re-intensified into a hurricane on Thursday, and it may become a major hurricane by Friday.