Recent deadly flash floods across central Texas, New Mexico, and the Carolinas were exacerbated by slow-moving thunderstorms and heavy rain. While climate change is not the sole cause, it significantly affects rainfall patterns. A warmer atmosphere increases water vapor capacity, which contributes to heavier rain. Research indicates that a one-degree temperature rise corresponds with a 4% increase in water vapor in clouds, leading to increased rainfall intensity in flood-prone regions such as San Antonio. A seemingly small increase in rainfall intensity can transform heavy rains into life-threatening flash floods.
A warmer atmosphere can hold more water vapor, which is a fundamental component for showers and storms. More water vapor in a storm leads to heavier rainfall.
A one-degree rise in air temperature correlates to a 4% increase in water vapor content in a cloud, impacting rainfall levels significantly.
San Antonio has observed a 6% increase in rainfall intensity from showers and storms. In flood-prone regions, this increment can escalate a heavy rain event into a dangerous flash flood.
Climate change influences flash floods, evident in the recent deadly floods across central Texas, New Mexico, and the Carolinas.
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