WASHINGTON (AP) — Heat waves that lead to sudden and damaging drought are spreading across the globe at an accelerating rate, highlighting how climate change-fueled extremes can build dangerously off each other, a new study found. Researchers from South Korea and Australia looked at compound extreme weather — a one-two punch of heat and drought — and found it increasing as the world warms. But what’s rising especially fast is the more damaging type when the heat comes first and that triggers