* WHAT...Dangerously hot conditions each afternoon with heat index values between 110 to 113 expected.
* WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia.
* WHEN...For the first Extreme Heat Warning, until 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday. For the third Extreme Heat Warning, from 10 AM to 8 PM EDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.