India, Dec. 16 -- Unprecedented flash flooding across large parts of the US in summer 2025 killed hundreds and caused widespread damage

At the same time, all major hurricanes curved away from the US mainland, defying typical seasonal patterns

Scientists say both extremes were shaped by an unusually weak and southward-shifted polar jet stream, a trend linked to climate change

The summer of 2025 brought unprecedented flash flooding across the United States, with the central and eastern regions hit particularly hard. These storms claimed hundreds of lives across Texas, Kentucky and several other states and caused widespread destruction.

At the same time, every hurricane that formed, including the three powerful Category 5 storms, steered...