Early Season Heatwave Threatens Western US

Why this matters: This early heatwave could have significant impacts on public health, strain water resources, and increase the likelihood of wildfires. The unusual timing also means people are less acclimatized to extreme heat.

The heatwave is driven by a strong and persistent high-pressure system, often referred to as a "heat dome," settling over the western US. This system is expected to bring two waves of intense heat, first impacting the West Coast and then spreading eastward.

In Southern California, daily temperature records are at risk of being broken, with potential for all-time March records to fall. The interior Southwest, including deserts in California, Nevada, and Arizona, could see temperatures exceeding 100°F (37.8°C).

The rapid snowmelt caused by the heatwave is a concern for water managers, as it could lead to an early peak in runoff and potentially lower river and reservoir levels later in the spring and summer.

While the increased fire risk is somewhat mitigated by light winds in California, the risk is higher further east due to ongoing drought conditions and stronger winds.

California, Nevada, Arizona, New Mexico, Utah, Colorado, Oregon, Idaho, and Wyoming.

The first wave will hit the west coast in the coming days, with a stronger wave expected to start next week.

Public health risks, accelerated snowmelt, increased wildfire risk, and potential water supply issues.

Do you think these early heatwaves will become more common? Share this article with others who need to stay ahead of this trend!