**FOR IMMEDIATE RELEASE**

FOR IMMEDIATE RELEASE

NATIONAL WEATHER SERVICE ISSUES URGENT HEAT ADVISORY FOR 17 STATES

Location: A sweeping region encompassing the Pacific Northwest, the Central Plains, and the Mid-Atlantic, including major metropolitan areas such as Portland, Oregon; Kansas City, Missouri; and Washington, D.C.

When: The advisory is in effect from 10:00 AM local time today through 8:00 PM local time on Thursday, August 17, 2023.

Who: The National Weather Service (NWS) has issued the warning for an estimated 45 million residents. Vulnerable populations, including the elderly, infants, and individuals with pre-existing respiratory conditions, are at the highest risk of heat-related illness.

What: A dangerous heat wave is forecast to push heat index values to between 105°F (40.5°C) and 110°F (43.3°C). Authorities are warning of “major” to “extreme” heat risk levels, which can cause heat stroke and cardiovascular strain even in healthy individuals during prolonged exposure.

Why: A stationary high-pressure system, colloquially termed a “heat dome,” has stalled over the continental United States, trapping hot, humid air near the surface and preventing cooling overnight temperatures. Meteorologists attribute the intensity of this event to a persistent upper-level ridge.

Official Guidance: Local emergency management offices are urging residents to limit outdoor activity, remain hydrated, and locate public cooling centers that have been established in community centers and libraries. Utility companies are advising residents to conserve energy between 2:00 PM and 7:00 PM to prevent grid strain.

Outlook: The NWS projects a slight cooling trend by late Thursday evening, though temperatures are expected to remain above seasonal averages through the weekend.