Heat Advisory: New Castle; Somerset; Middlesex; Western Monmouth; Mercer; Gloucester; Camden; Northwestern Burlington; Ocean; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks

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Heat Advisory — New Castle; Somerset; Middlesex; Western Monmouth; Mercer; Gloucester; Camden; Northwestern Burlington; Ocean; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks Severity: Moderate. Certainty: Likely. * WHAT...Heat index values up to 103 degrees expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM this morning to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Warm and very humid conditions at night will not offer much relief from the heat and humidity.