United States braces for new western heat dome
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The US National Weather Service has issued Extreme Heat Watches for large areas of Montana, northern Wyoming, and Utah as a powerful heat dome develops over the western United States. Issued on 8 July 2026, the watches cover conditions expected from Saturday, 11 July, through late Sunday, 12 July, with widespread temperatures above 38°C (100°F) and some locations nearing 43°C (110°F). Forecasters warn of limited nighttime relief, sharply increasing risks of heat-related illness, especially for vulnerable people and outdoor workers. The system is expected to expand into western Canada and follows a late June–early July eastern US heatwave linked to at least 44 deaths.
Timeline
- Late June 2026 Eastern United States heatwave intensifies
- Early July 2026 At least 44 heat-related deaths confirmed
- Late June–early July 2026 Eastern temperatures exceed 38°C widely
- July 8 2026 Extreme Heat Watches formally issued
- July 8 2026 Forecasters identify strengthening western heat dome
- July 11 2026 Western daytime highs surpass 38°C
- July 11–12 2026 Limited overnight cooling worsens risks
- Mid-July 2026 Heat dome expands into western Canada
Sources
JQJO Editorial Desk · Human reviewed · AI assisted. Report a correction.












