We still don't know why tornados happen, but we're getting closer to finding answers — just as the Trump administration threatens to cut $1 billion in funding ...

As wildfire smoke becomes a frequent summer hazard across large parts of the US, knowing the risk at the neighborhood scale ...

As wildfire smoke becomes a frequent summer hazard across large parts of the US, knowing the risk at the neighborhood scale ...

Over 170 people, including dozens of children, have died in heavy monsoon rainfall and flooding in Pakistan in recent days.