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About 42 million people remain under heat alerts Friday as "dangerous and record-breaking" heat will persist in the West through Saturday, according to the National Weather Service.
The heat can be particularly dangerous in some cities west of the Cascades in western Washington, such as Seattle, Olympia and Port Angeles, where many people and homes do not have air conditioning.
The National Weather Service issued a heat advisory for South Puget Sound and several other parts of Washington that will be in effect from 8 a.m. Thursday, Sept. 5, through 11 p.m. Friday, Sept. 6.
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
An excessive heat warning is a notice issued by the National Weather Service of the United States within 12 hours of the heat index reaching one of two criteria levels. In most areas, a warning will be issued if there is a heat index of at least 105 °F (41 °C) for more than three hours per day for two consecutive days, or if the heat index is greater than 115 °F (46 °C) for any period of time.
A heat advisory is a notice issued by the National Weather Service of the United States.Local offices often have their own criteria. High values of the heat index are caused by temperatures being significantly above normal and high humidities, and such high levels can pose a threat to human life through conditions such as heat stroke.
Near Toledo, Ohio, the city of Rossford called off its weekly street fair because of temperatures expected to reach the upper 90s. Record-breaking US heat wave scorches the Midwest and Northeast ...
On May 12, the National Weather Service issued a health advisory between May 13 and 15 for the western parts of Oregon and Washington state. [12] [13] On May 13, four locations in the Seattle region broke temperature records, with Quillayute reaching 90 °F (32 °C), SeaTac reaching 86 °F (30 °C), and Olympia and Hoquiam reaching 89 °F (32 °C).