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Extreme Heat Warning
ActiveDistrict of Columbia; Frederick; Carroll; Northern Baltimore; Cecil
Status
In Progress
Started about 2 hours ago
Ends
Issued
Severity
Severe
Urgency
Expected
Certainty
Likely
Details
* WHAT...Dangerously hot conditions each afternoon with heat index values between 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...For the first Extreme Heat Warning, until 9 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 9 PM EDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* 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 are possible again Sunday afternoon.
Data from the National Weather Service
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