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Heatwave Shatters Records
An unprecedented early spring heatwave gripped the western US, shattering March records across eight states.
“Four stations recorded temperatures of 112 degrees Fahrenheit, besting the all-time US March record set just the day before”
Four stations recorded 112°F while Martinez Lake reached 110°F—the highest March temperature ever in the US.
The heat dome was the strongest ever observed over the Southwest in March.
Study Links Heatwave to Climate Change
A study concluded the heatwave would have been virtually impossible without human-induced climate change.
The event was classified as a one-in-500-years occurrence in the modern climate.
Heat waves in the western US have grown about 4°C hotter since the industrial era began.
Heatwave Presents Health Risks
The extreme temperatures pose a significant public health threat.
“Extreme heat is the leading cause of weather-related fatalities in the US”
The heat dome is creating stable atmospheric conditions, suppressing precipitation.
Limited overnight cooling and lack of air-conditioning add to heat stress.
Environmental Impacts Loom
The heatwave is expected to accelerate snowmelt in the mountains.
Snowpack levels are already low due to a warm winter.
Environmental consequences could include higher wildfire risk.