内容摘要：when the shooting happened. Ten people were wounded by gunfire, mostly on the lower parts of their bodies, and one person was hurt by a falling speaker, authorities said.

when the shooting happened. Ten people were wounded by gunfire, mostly on the lower parts of their bodies, and one person was hurt by a falling speaker, authorities said.

A worker walks through Energy Vault’s facility, a company that is creating an emergency power system that relies on hydrogen and battery storage, on Tuesday, May 27, 2025, in Calistoga, Calif. (AP Photo/Terry Chea)A tank that holds liquid hydrogen, left, which is converted to gas to run the fuel cells, sits at at Energy Vault, a company that is creating an emergency power system that relies on hydrogen and battery storage, on Tuesday, May 27, 2025, in Calistoga, Calif. (AP Photo/Annika Hammerschlag)

A tank that holds liquid hydrogen, left, which is converted to gas to run the fuel cells, sits at at Energy Vault, a company that is creating an emergency power system that relies on hydrogen and battery storage, on Tuesday, May 27, 2025, in Calistoga, Calif. (AP Photo/Annika Hammerschlag)The installation sits next to where Pacific Gas & Electric used to set up nine mobile generators every year from late spring through fall. Behind a chain-link fence stand six hydrogen fuel cells standing two stories tall made by Plug Power in New York. Water vapor wafted from one of the fuel cells being tested as The Associated Press got an exclusive tour of the site as it was in final testing.Shipping containers hold two pairs of Energy Vault’s lithium-ion batteries. Nearby, a cinder block wall surrounds a massive, double-walled steel tank that holds 80,000 gallons (302,833 liters) of extremely cold liquid hydrogen that gets converted to gas to run the fuel cells.

An employee drives a forklift at Energy Vault, a company that is creating an emergency power system that relies on hydrogen and battery storage, on Tuesday, May 27, 2025, in Calistoga, Calif. (AP Photo/Annika Hammerschlag)An employee drives a forklift at Energy Vault, a company that is creating an emergency power system that relies on hydrogen and battery storage, on Tuesday, May 27, 2025, in Calistoga, Calif. (AP Photo/Annika Hammerschlag)

California utilities,

, have had to pay large settlements over igniting wildfires. PG&E began cutting power at times to reduce fire risk in 2018, one of California’s deadliest and most destructive wildfire years. It ships diesel generators to about a dozen towns to provide backup power during those periods.“It’s an interesting experience. It sounds like somebody on the outside of your vehicle is hitting you with a hammer,” said Northern Illinois University meteorology professor Victor Gensini, one of the lead researchers.

A team of journalists from The Associated Press joined them this week in a several-day trek across the Great Plains, starting Tuesday morning in northern Texas with a weather briefing before joining a caravan of scientists and students looking for ice.Members of the University of Colorado Boulder’s Integrated Remote and In-Situ Sensing flight team stage in a Walmart parking lot before a Project ICECHIP operation Tuesday, June 3, 2025, in Atlus, Okla. (AP Photo/Carolyn Kaster)

Members of the University of Colorado Boulder’s Integrated Remote and In-Situ Sensing flight team stage in a Walmart parking lot before a Project ICECHIP operation Tuesday, June 3, 2025, in Atlus, Okla. (AP Photo/Carolyn Kaster)The caravan features more than a dozen radar trucks and weather balloon launching vehicles. At each site, the scientists load and unload drones, lasers and cameras and other specialized equipment. There are foam pads to measure hail impact and experimental roofing material. There are even special person-sized funnels to collect pristine hail before it hits the ground and becomes tainted with dirt.