An extreme heat watch is a warning issued by the U.S. National Weather Service (NWS) when forecasted high temperatures are expected to reach between 95°F (35°C) and 100°F (38°C) in the continental U.S., posing a significant risk of heat stroke and heat exhaustion. For example, the NWS office in Pendleton, Oregon, issued a watch on August 8, 2025, forecasting dangerously hot conditions of 99–103°F from Sunday afternoon through Tuesday evening. This alert covered regions like the Columbia River Gorge, the Lower Columbia Basin, and the Yakima Valley, warning that extreme heat poses a moderate to major risk of heat-related illness. In response, the NWS advises the public to drink plenty of fluids, stay in air-conditioned rooms, avoid the sun, and check on vulnerable relatives and neighbors. It also strongly emphasizes that young children and pets should never be left unattended in vehicles during such extreme heat events.