Hurricane Polo nears Category 5 intensity
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Hurricane Polo is a Category 5 hurricane and its maximum winds peaked at 180 mph earlier in the week after rapid intensification.
Polo's climb to 160 mph appears to be the fastest recorded in the eastern Pacific, threatening Mexico with dangerous rain and surf.
The major hurricane could strengthen further as it surfs up the Mexican coast on "Kelvin waves."
Hurricane Polo could become a "catastrophic" category 5 storm in the coming days, forecasters have warned.