Extreme Heat Warning for District of Columbia; Frederick; Carroll +31 more
Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
WhatFor the Heat Advisory, heat index values up to 107. For the first Extreme Heat...WherePortions of DC, central, north central, northeast, northern, and southern...WhenFor the Heat Advisory, until 8 PM EDT this evening. For the first Extreme Heat...