Historically, the oceanic phenomenon boosts precipitation in the southern U.S. Here's a glimpse at the pain to come.

NEW YORK (AP) — A chaotic climate phenomenon is intensifying heavy rains and floods in the Southwest, experts say. A natural warming cycle called El Niño is sizzling Pacific Ocean waters, leaking moisture into the air that can fuel passing storms. Such El Niño events can happen irregularly every couple of years, but…