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Extreme Heat Warning
ActiveDistrict of Columbia; Frederick; Carroll; Northern Baltimore; Cecil
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* WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values 110 to 115 expected.
* WHERE...Washington DC, and portions of central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia.
* WHEN...From 10 AM this morning to 9 PM EDT this evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Early morning low temperatures in the 70s and 80s combined with oppressive humidity will result in little to no overnight relief. Prolonged excessive heat may impact power, water, and transportation systems. Heat index values around 100 to 104 are possible again Sunday afternoon.
Data from the National Weather Service
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