Hurricane Polo grows into powerful Category 5 storm off Mexico. See its path.

Hurricane Polo rapidly intensified in the Pacific as it continued on its path off the coast of southwestern Mexico on Tuesday, growing into a powerful Category 5 storm that could bring life-threatening flooding to parts of the states of Guerrero and Michoacán, the U.S. National Hurricane Center said. The Miami-based center called Polo "extremely dangerous" as its maximum sustained winds climbed to 165 mph. The storm was expected to fluctuate in intensity over the next few days, forecasters said, but would remain a "very powerful major hurricane." It was expected to remain centered offshore.The Associated Press quoted Kristen L. Corbosiero, professor at the University at Albany's Department of Atmospheric & Environmental Sciences, as calling Polo "one of the strongest storms ever in the (Pacific) Basin."Hurricane Polo's pathAs of early Wednesday, Polo was located off the coast of Zihuatanejo, a coastal resort city in the Mexican state of Guerrero, and Manzanillo, another coastal city and resort destination in the state of Colima. It hurled hurricane-force winds outward up to 40 miles from its center and tropical storm-force winds some 105 miles out, but was roughly stationary. H...