Extreme Heat Watch: Southern Centre; Huntingdon; Mifflin; Juniata; Fulton; Franklin; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster

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Extreme Heat Watch — Southern Centre; Huntingdon; Mifflin; Juniata; Fulton; Franklin; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot conditions with heat index values between 105 and 110. * WHERE...A portion of central Pennsylvania. * WHEN...From Wednesday afternoon through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Very warm low temperatures, mainly in the low to mid 70s at night will not offer much relief from the heat. This combined with multiple days of near record breaking temperatures will amplify the impacts from the heat and humidity.