Polo Becomes a Major Hurricane, and a Second System Heads for Hawaii

Southwestern Mexico braced for heavy rain and mudslides after Polo became a major hurricane, NPR reports. Forecasters also warned that another system headed for Hawaii could cause catastrophic flooding later in the week. The pairing is a reminder that the dangerous part of a storm is often what it drops rather than how it is classified: slope failure on one coast, flooding risk on islands hundreds of kilometres away.