* WHAT. Heat index values of 105 to 109 degrees are expected. * WHERE. Portions of northeast North Carolina and central, east central, eastern, north central, south central, and southeast Virginia. * WHEN. From 11 AM this morning to 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the Small Craft Advisory, south winds 10 to 20 kt with gusts up to 30 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Patuxent River to Broomes Island MD. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 ft. * WHERE. Chesapeake Bay from Drum Point MD to Smith Point VA and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 20 kt with gusts up to 25 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, and Patapsco River including Baltimore Harbor. * WHEN. From 10 AM to 6 PM EDT Today. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Dangerously hot conditions with heat index values up to 110 expected. * WHERE. Portions of central and southern Maryland, The District of Columbia, and portions of the northern neck of Virginia. * WHEN. From noon today to 8 PM EDT. * IMPACTS. Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS. Very warm and humid conditions will persist into the overnight hours. Ensure to stay hydrated and find ways to stay cool.

* WHAT. Heat index values up to 108 expected. * WHERE. Portions of central and northern Maryland, portions of northern and central Virginia. * WHEN. From noon today to 8 PM EDT. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur.

* WHAT. Heat index values up to 105 expected. * WHERE. Portions of north central and western Maryland, northwest and western Virginia and eastern West Virginia. * WHEN. From noon today to 8 PM EDT. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur.

* WHAT. South winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 ft. * WHERE. Chesapeake Bay from Drum Point MD to Smith Point VA and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 20 kt with gusts up to 25 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, and Patapsco River including Baltimore Harbor. * WHEN. From 10 AM to 6 PM EDT Today. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, south winds 10 to 20 kt with gusts up to 25 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Patuxent River to Broomes Island MD. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values of 105 to 109 degrees are expected. * WHERE. Portions of northeast North Carolina and central, east central, eastern, north central, south central, and southeast Virginia. * WHEN. From 11 AM this morning to 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 107. * WHERE. In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.