Axios

The world's largest active volcano has started to erupt for the first time since 1984, local authorities said Monday.

Driving the news: Hawaii's Mauna Loa volcano — located on the Big Island — began erupting late Sunday night, the U.S. Geological Survey said.

The 2021 heat wave in the Pacific Northwest, which killed hundreds of people in the U.S. and Canada, was a harbinger of a new generation of climate disasters to come, a new study finds.

Why it matters: In the most comprehensive analysis to date of what made the heat wave so extreme, scientists ruled out the possibility this was a "black swan" event, which is unpredictable and unlikely to recur.