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SoCal Swelters: Humidity Hits Record Highs
28 Aug
Summary
- Southern California humidity levels reached unprecedented highs Thursday.
- The Salton Sea saw a dew point of 81 degrees, surpassing humid states.
- Warm oceans, a heat dome, and climate change contribute to the extreme humidity.

Southern California, typically known for its dry climate, has been experiencing exceptionally high humidity levels. On Thursday, the dew point near the Salton Sea reached 81 degrees, exceeding that of famously humid states like Florida and Louisiana. Los Angeles and San Diego also recorded dew points of 73 degrees, marking the highest values in decades for these cities.
This sudden increase in moisture is due to a convergence of factors. Unusually warm ocean temperatures have created a severe marine heat wave, increasing evaporation. Concurrently, a strong heat dome is producing intense heat and humidity while pulling tropical moisture northward. Furthermore, a warmer global atmosphere naturally holds more water vapor, exacerbating humidity conditions.
The shallow, hot waters of the Salton Sea contribute significantly by accelerating evaporation, adding yet more moisture to the already saturated air in that specific area. Residents have reported experiencing discomfort, increased mosquito activity, and higher energy bills as a result of the unusual weather.