When the Hunga Tonga-Hunga Ha’apai volcano erupted on Jan. 15, it sent a tsunami racing around the world and set off a sonic boom that circled the globe twice. The eruption also sent a plume into the stratosphere with enough water vapor to fill more than 58,000 Olympic-size swimming pools. In addition to the long-term warming from human activities (such as the burning of fossil fuels), the sheer amount of water vapor from this South Pacific Ocean event could further warm Earth’s surface temporar