Unprecedented March Heat Wave Bakes the West Coast

Tue Mar 17 2026 23:44:05 GMT+0000 (Coordinated Universal Time)

San Francisco experiences record-high temperatures as unusual March heat wave sweeps across parts of the U.S., affecting cities like Las Vegas and Phoenix.

The West Coast is grappling with its hottest March in two decades, sending temperatures soaring to nearly 90°F in San Francisco and over 100°F in Phoenix. Residents are enjoying the summer-like weather despite challenges, such as lack of air conditioning. Meanwhile, the Midwest and eastern U.S. face severe winter storms.

SAN FRANCISCO (AP) — San Franciscans bared an unusual amount of skin for this time of year, as a city better known for its chilly summers is basking in its hottest March in at least two decades, part of a rare winter heat wave baking the U.S. West.

With Bay Area temperatures nearing 90°F (32.2°C), Phoenix is also bracing for an unprecedented spike, potentially exceeding 100°F (37.7°C) within the week. Las Vegas is poised to reach its earliest-ever triple-digit temperature.

Meanwhile, the Midwest battles powerful snow storms that have resulted in thousands of flight cancellations.

Crissy Field saw an influx of sunbathers, embraced by the warm weather. It feels like summer already in March... The dogs love running in the water! exclaimed local dog walker Justyce Roliz.

Resident Jessica Ling acknowledged the pleasant surprise of the hot weather but struggled without air conditioning, opting to spend as much time outdoors.

Record temperatures were recorded around the Bay Area earlier in the week, with highs on Tuesday expected to climb higher, causing concern and excitement among locals.

Roger Gass, a meteorologist with the National Weather Service, noted this temperature surge isn't unprecedented but is rare. Historical references to March heat waves can be tracked back to 2004 and 2005.

Meanwhile, Las Vegas forecasts temperatures between 94°F and 98°F over the next few days, with advisories for visitors to stay hydrated among the heat.

The extreme weather isn't limited to California, with areas across the Southwest facing excessive heat warnings for regions in Grand Canyon National Park, cautioned to avoid strenuous activities amidst dangerously high temperatures.

Water providers in Colorado are also concerned about the long-term implications of this unusual warmth, urging residents not to prematurely activate lawn sprinklers due to limited water availability.

As temperatures continue to rise, the situation landscape of the West Coast serves as a glaring reminder of the effects of climate change and the shifting seasons.