The Duluth Fire Department warns of dangerous swimming conditions at Park Point beaches due to high risk of rip currents, advising people to stay out of the water.

O'ahu faces increased humidity and shower activity due to deeper moisture over the islands with breezy trade winds. The NWS warns of windward showers, aviation turbulence, and advises mariners of strong trades and possible coastal inundation.

The National Weather Service forecasts cooler temperatures, showers, and thunderstorms mid-week for Northern California, with drier, warmer weather returning later.