* WHAT. Heat index values up to 102. * WHERE. Portions of northern Delaware, New Jersey, and southeast Pennsylvania. * WHEN. Until 9 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerous rip currents. * WHERE. Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic and Coastal Ocean. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Rip currents can sweep even the best swimmers away from shore into deeper water.

* WHAT. Heat index values up to 102. * WHERE. Portions of northern Delaware, New Jersey, and southeast Pennsylvania. * WHEN. Until 9 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the Dense Fog Advisory, dense fog will reduce visibility to 1 NM or less. For the Small Craft Advisory, southwest winds 10 to 20 kt with gusts up to 25 kt and seas 3 to 5 ft. * WHERE. Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm and Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm. * WHEN. For the Dense Fog Advisory, until 10 PM EDT this evening. For the Small Craft Advisory, until 6 AM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

* WHAT. For the Dense Fog Advisory, dense fog will reduce visibility to 1 NM or less. For the Small Craft Advisory, southwest winds 10 to 20 kt with gusts up to 25 kt and seas 3 to 5 ft. * WHERE. Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm and Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm. * WHEN. For the Dense Fog Advisory, until 10 PM EDT this evening. For the Small Craft Advisory, until 6 AM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

* WHAT. South winds 15 to 20 kt with gusts up to 25 kt. * WHERE. Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm and Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm. * WHEN. Until 11 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

The New Jersey Department of Environmental Protection has issued a Code Orange Air Quality Action Day for Ground Level Ozone, until 11 PM EDT this evening. An Air Quality Advisory means that air quality within the region may approach or exceed unhealthy standards. For more information on current and forecast concentrations of ground-level ozone and fine particulates, visit www.airnow.gov or www.state.nj.us/dep/airmon/ or call the New Jersey Bureau of Air Monitoring at 609-292-0138