The Southwest U.S. is experiencing its first heat wave of the season with temperatures soaring to potentially record-breaking highs over 110°F, posing risks to residents and prompting heat warnings.
The average temperature in July was 48.4 degrees — 6.7 degrees above normal, with 11 hot days in a row. Such extreme warmth can accelerate the greening and permafrost thaw on the North Slope.
A power line fell on a car in Portland, killing three people and injuring a baby during an ice storm that turned roads and mountain highways treacherous in the Pacific Northwest.
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