East Asia (China, Japan, and the NIEs) ran a $600 billion current account surplus in 2017. "Official" (central bank and sovereign fund) outflows accounted for about half of that. Asia's foreign exchange market intervention isn't as overt as it once was, but also hasn't entirely gone away.
The U.S. government responds to scores of disasters each year, coordinating closely with state, local, and foreign partners. However, more frequent and severe storms, fires, and floods are straining resources.