Canadian scientists say they’ve finally identified what is likely causing giant colourful sea stars in the Pacific Northwest to literally waste away: a bacterium from the same family that causes cholera in humans.

With warmer weather, Health Canada is warning about the growing risk of tick-borne illnesses like Lyme disease now spreading to new regions. Dr. Christopher Labos weighs in and also talks about staying safe amid widespread air quality alerts due to wildfire smoke.

Sweltering summer temperatures caused heat warnings across six provinces and territories on Tuesday, with parts of Ontario recording temperatures hitting 40 C including the humidex.

It’s bird banding season at the Beaverhill Bird Observatory. The facility near Tofield, Alta., has been carefully tracking birds for decades. The research to chronicle local species has become all the more important as climate change forces migratory birds to adapt.

One year ago, a wildfire devastated the town of Jasper, Alta., and led to a sudden evacuation. The community is rebuilding but many residents who lost homes or stayed to fight the blaze are relying on mental health supports to grapple with the lasting impacts.

The International Court of Justice has ruled that countries that fail to take measures to protect the planet from climate change may be in violation of international law, and nations harmed by its effects could be entitled to reparations.

An advisory opinion by the International Court of Justice announced countries could be in violation of international law if they fail to 'take appropriate action to protect the climate system.'

CBC Kids News contributor Isabelle MacNeil explains what happens to your body when you breathe in wildfire smoke.

Environmentalists like David Suzuki say not enough has been done to avoid the worst impacts of climate change. But Seth Klein with the Climate Emergency Unit says a lot can still be done if people get politics out of the way of action and develop solutions around renewable energy, high-speed rail and retrofits in public infrastructure.

Volunteers in Comfort, Texas, used heavy equipment and cadaver dogs to search for victims of a deadly flash flood. U.S. President Donald Trump is set to visit on Friday and is expected to face questions about his plan to scale back federal disaster relief.

In an interview on CBC's The Early Edition, environmental activist David Suzuki explained comments he made during an iPolitics interview, where he declared "humanity has lost the fight against climate change." Suzuki said elevating economics and politics over science for decades has brought the world to a critical point.

Hundreds of residents of Lynn Lake, Man., are being forced out of the northern community, with wildfire activity once again threatening safety only two weeks after people were allowed to return home.

The wildfire burning closest to Lytton, B.C., is not expected to grow, but another north of the village has grown significantly in recent days. Mayor Denise O'Connor says the fires have triggered memories of the 2021 fire that burned down the entire village, including her own home.

A heat dome has created dangerous heat conditions for large swaths of Europe, fuelling wildfires in Turkey and prompting heat alerts in several countries.

Major cities and tourist destinations across Europe are recording unusually high temperatures as June draws to a close. In southern Europe, the hot, dry weather created conditions for wildfires.

Residents in the small community of Denare Beach, Sask., are returning home in a phased re-entry after being forced out nearly a month ago due to a fast-moving wildfire which destroyed more than 200 homes.

As parts of Ontario, Quebec and Nova Scotia swelter in a record-breaking heat wave, Dr. Christopher Labos breaks down how extreme heat affects the various systems of the body and how you can protect yourself.