The National Weather Service advised an estimated 450,000 residents in California to stay indoors on May 7 ahead of expected extreme heat, according to Newsweek. The warnings highlight rising concerns over health threats posed by extreme heat and climate change. California is experiencing a particularly hot year as temperatures rise worldwide, with the January 2026 to March 2026 baseline reaching 4.7 degrees above the 2025 average.
Since May 1, temperatures on the coast of San Diego County have maintained historic averages, while inland areas have surpassed records. Ramona reached a high of 100 degrees on May 10, exceeding the previous record of 91 degrees from 1981. Downtown San Diego documented its warmest February day in more than four years on Feb. 27 at 85 degrees. In March, residents saw a 16-day streak of daily temperature records, while Vista and Chula Vista experienced their highest temperatures to date.
According to researchers at the Scripps Institution of Oceanography, unusually warm sea surface temperatures may possibly increase humidity and heat conditions along the Southern California coast…