* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay north of Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. From 2 PM this afternoon to 2 AM EDT Wednesday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay north of Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. Until 2 AM EDT Wednesday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values around 110. For the Heat Advisory, heat index values around 105 expected. * WHERE. Portions of central, northeast, northern and southern Maryland, The District of Columbia and central and northern Virginia. * WHEN. For the Excessive Heat Warning, until 8 PM EDT this evening. For the Heat Advisory, from 11 AM to 8 PM EDT Wednesday. * 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, adding heat stress to those without air conditioning. Ensure to stay hydrated and find ways to stay cool.

* WHAT. Heat index values up to 109 expected. * WHERE. Portions of southeast Maryland, northeast North Carolina, and central, east central, eastern, north central, south central, and southeast Virginia. * WHEN. Until 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, Delaware Beaches County. In New Jersey, Cape May County. * WHEN. Until 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 110. * WHERE. In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. In New Jersey, Salem County. * WHEN. Until 8 PM EDT Wednesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 109. * WHERE. Portions of northern Delaware, New Jersey, and southeast Pennsylvania. * WHEN. Until 8 PM EDT Wednesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 109. * WHERE. Atlantic and Cumberland Counties. * WHEN. Until 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Tuesday for Atlantic and Cape May Counties. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children. people suffering from asthma. heart disease or other lung diseases. and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles. visit http://www.state.nj.us/dep/

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Tuesday for Southwestern New Jersey. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children. people suffering from asthma. heart disease or other lung diseases. and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles. visit http://www.state.nj.us/dep/

The Delaware Valley Regional Planning Commission has issued a code orange air quality alert Tuesday for The Philadelphia Metro area. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children. people suffering from asthma. heart disease or other lung diseases. and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles. visit http://www.phila.gov/health/units/ams/

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Tuesday for Salem and Cumberland Counties. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children. people suffering from asthma. heart disease or other lung diseases. and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles. visit http://www.state.nj.us/dep/