"The study covered seven #heatwaves over the last 11 years. They lasted 7 to 14 days and affected 1.5 million to 34.2 million people.
The events resulted in 460 official deaths — though the figure could be as high as almost 4,000 — as well as 5,000 hospitalizations, 10,600 emergency room visits, 138,000 outpatient visits, and 344 adverse birth outcomes. They cost the state $7.7 billion in lost wages, manufacturing and agricultural productivity, power outages, and more."
https://www.thecooldown.com/outdoors/california-heat-waves-impact-health-insurance/