Powerful Hurricane Erin has undergone a period of astonishingly rapid intensification — a phenomenon that has become far more common in recent years as the planet warms. It was a rare Category 5 for a time Saturday before becoming a Category 4,

Sunday features hot temperatures with very high humidity, with dew points once again at or a little above 70 degrees for many of us. An uneventful cold front passing through the area Sunday night will bring an end to this one-day heat fest, and now it’s on to cooler temperatures to start the work week.

Hurricane Erin is expected to bring dangerous surf and rip currents to the Jersey Shore this week as it tracks far offshore.

A westward-moving tropical wave could produce an area of low pressure in the tropical Atlantic late in the week of Aug. 18, the hurricane center said on Aug. 16. The center shows a 20% chance of storm formation over the next week.

Hurricane Erin is passing the Caribbean to its north as a powerful Category 5 cyclone. The hurricane is expected to maintain its intensity for the next several days, while generating dangerous waves along the Southeast coast.