rjzimmerman:

Excerpt from this story from the LA Times:

It was the hottest August on record in California.

For more than three weeks in 2020, back-to-back heat waves settled over the Southwest, claiming dozens of lives and leaving tens of millions of people sweltering in triple-digit temperatures. The days brought suffering and the nights offered little relief. On maps of the record heat, Southern California glowed like an ember, its normally temperate coast shaded orange, its inland cities and desert towns a deep, smoldering purple.

Extreme heat is one of the deadliest consequences of global warming. But in a state that prides itself as a climate leader, California chronically undercounts the death toll and has failed to address the growing threat of heat-related illness and death, according to a Los Angeles Times investigation.

Between 2010 and 2019, the hottest decade on record, California’s official data from death certificates attributed 599 deaths to heat exposure.

But a Times analysis found that the true toll is probably six times higher. An examination of mortality data from this period shows that thousands more people died on extremely hot days than would have been typical during milder weather. All told, the analysis estimates that extreme heat caused about 3,900 deaths.

California’s undercount is one of the ways it overlooks the threat posed by heat waves, even as climate change delivers them more frequently, more intensely and with deadlier consequences. Other states are moving with greater urgency to confront this public health challenge that disproportionately imperils the elderly and vulnerable.

Extreme heat did not suddenly become a threat to Californians’ lives. The Times found that state leaders have ignored years of warnings from within their own agencies that heat was becoming more dangerous. Data reviewed by The Times show heat-related hospital visits increasing in some parts of California, including Los Angeles County, for at least the last 15 years.

Experts interviewed by The Times said an effective state response would include identifying and assisting vulnerable populations, and putting in place a surveillance system to track when and where heat-related deaths and injuries are occurring. But the California Department of Public Health doesn’t collect that kind of real-time data. It can’t say how many people died in last year’s heat waves because it does not examine death records during severe heat waves — as authorities in Oregon and Washington did this summer after days of record-breaking temperatures.