* WHAT. Heat index values up to around 105 to 107 expected, with heat index values generally between 100 and 104 degrees west of the Blue Ridge Mountains. * WHERE. Portions of central, north central, northeast, northern, southern and western Maryland, The District of Columbia, central, northern and northwest Virginia and eastern and panhandle West Virginia. * WHEN. From 11 AM to 8 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. Oppressive heat and humidity will overspread the area Saturday and last into Sunday. Little relief from the heat is expected Saturday night with low temperatures in mid 70s to near 80 for most, which will compound heat stress on those without air conditioning.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay and adjoining estuaries north of Smith Point VA, and Tidal Potomac from Cobb Island MD to Smith Point VA. * WHEN. From 4 PM this afternoon to 2 AM EDT Saturday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Heat Advisory, heat index values up to 102. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 104 possible. * WHERE. Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 102 possible. * WHERE. Eastern Monmouth and Coastal Ocean Counties. * WHEN. From Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Heat Advisory, heat index values up to 104. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 107 possible. * WHERE. Western Monmouth, Ocean, and Southeastern Burlington Counties. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Heat Advisory, heat index values up to 99. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 107 possible. * WHERE. Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Saturday. For the Excessive Heat Watch, from Saturday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 108 possible. * WHERE. Portions of central and southern Delaware, northeast Maryland, and southern New Jersey. * WHEN. From Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Saturday for Northeast Maryland. 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 the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx.

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday for Middlesex and Mercer 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 Delaware Valley Regional Planning Commission has issued a code orange air quality alert Saturday 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 Saturday for Ocean and Southeastern Burlington 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 Saturday for North Central 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 New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday for Sussex and Warren 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 Saturday 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/

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday 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 New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday for Monmouth County. 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/

* WHAT. For the Heat Advisory, heat index values up to 100 degrees. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 100 degrees possible. * WHERE. Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Heat Advisory, heat index values up to 102 degrees. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 106 degrees possible. * WHERE. Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 106 degrees possible. * WHERE. Portions of central and southern Delaware, northeast Maryland, and southern New Jersey. * WHEN. From Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 100 degrees possible. * WHERE. Eastern Monmouth and Coastal Ocean Counties. * WHEN. From Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Heat Advisory, heat index values up to 102 degrees. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 107 degrees possible. * WHERE. Western Monmouth, Ocean, and Southeastern Burlington Counties. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay and adjoining estuaries north of Smith Point VA, and Tidal Potomac from Cobb Island MD to Smith Point VA. * WHEN. From 4 PM this afternoon to 2 AM EDT Saturday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values up to around 105 to 107 expected, with heat index values generally between 100 and 104 degrees west of the Blue Ridge Mountains. * WHERE. Portions of central, north central, northeast, northern, southern and western Maryland, The District of Columbia, central, northern and northwest Virginia and eastern and panhandle West Virginia. * WHEN. From 11 AM to 8 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. Oppressive heat and humidity will overspread the area Saturday and last into Sunday. Little relief from the heat is expected Saturday night with low temperatures in mid 70s to near 80 for most, which will compound heat stress on those without air conditioning.

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Friday for Sussex and Warren 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 Friday for Middlesex and Mercer 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 Delaware Valley Regional Planning Commission has issued a code orange air quality alert Friday 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 Friday for Ocean and Southeastern Burlington 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 Friday for Monmouth County. 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 Friday for North Central 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 New Jersey Department of Environmental Protection has issued a code orange air quality alert Friday 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 New Jersey Department of Environmental Protection has issued a code orange air quality alert Friday 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/