California heat waves lead to deaths, financial losses

Recent heat waves in California have resulted in hundreds of deaths and billions in economic losses over the past decade, a new report by the state insurance department reveals.

Levi Sumagaysay reports for CalMatters.


In short:

  • Seven heat events from 2013 to 2022 killed nearly 460 people and caused $7.7 billion in economic damage.
  • Effects include lost wages, productivity declines, agricultural disruptions, and infrastructure damage.
  • Low-income communities and minority groups face the highest heat-related death rates.

Key quote:

“It’s really important to understand that heat is a silent killer.”

— Michael Mendez, assistant professor of environmental planning and policy at UC Irvine

Why this matters:

Rising temperatures are more than just a summer inconvenience. They’re a serious threat to public health and the economy. Vulnerable populations, such as the elderly, children, and those with pre-existing health conditions, face the greatest risks. Hospitals and emergency services are stretched thin during extreme heat events, dealing with a surge in heat-related illnesses.

Woman in business suit with a protective mask over her face

The EPA's data on cancer risk from air pollution has gone dark

For decades, communities have relied on the agency's cancer risk estimates to hold polluters accountable. This year, it's missing.
Puerto Rico's coastline with buildings that are ruins in the distance

With Puerto Rico’s water crisis, climate change meets ineptitude

Puerto Rico's ongoing water crisis made national headlines last week, as many were left without water for days, and now the majority of the island is facing drought conditions.

Two men on a roof with overalls on installing a solar panel

‘The real challenge starts after sundown’: Europe’s heatwave boosted solar by up to 17% on hot days

A surge in solar power has helped meet heightened power demand from Europe’s blistering heatwaves, according to a new analysis.
White government building with large decorative pillars

What to know about the Supreme Court’s major climate case this fall

The decision could set a significant precedent for states and cities trying to hold fossil fuel companies accountable for climate impacts.
Wildland fire fighter, silhouetted  against flame-orange backdrop, training hose on wildfire.

Federal job cuts are making wildfires harder to fight

The Trump administration pushed out thousands of veteran U.S. Forest Service staff. An ‘extraordinary’ fire season is testing those who are left.
A Black woman putting her voting record into a box at a polling station

In Arizona, the thermostat is driving voters to the polls

Record heat, two rate hikes and a data center boom have turned utility bills — not climate — into the state’s most volatile issue.
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.