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SAN DIEGO (KGTV) – Another heat wave in the forecast could leave Californians in the dark this weekend. San Diego Gas and Electric is preparing for a hot weekend as high temps are expected to cause more strain on the power grid.Energy officials are hoping to avoid a repeat of last month when rolling blackouts swept through the state for the first time in 11 years.The California Independent System Operator, or CAISO, was forced to order blackouts in response to high demand.“For the grid to operate, demand on the grid needs to be matched evenly with supply,” said Helen Gao with SDG&E.Ahead of the heat this weekend, SDG&E meteorologists are closely monitoring conditions.At this point, CAISO says they haven’t told SDG&E to prepare for rotating outages over the weekend. CAISO says it plans to issue a Flex Alert, which it says is a voluntary call for conservation.CAISO said the recent rotating outages were the result of a number of factors, including generation units being out of service, reduction of the amount of energy California was able to import from other states, and a sudden drop in wind energy.If CAISO issues a flex alert, the power company will activate their demand response programs. It encourages customers to cut back on energy use to reduce strain on the grid. Outages would only be ordered by CAISO as a last resort. On Tuesday, the State Water Resource Control Board took action to prevent more outages in the future. They’re now along four gas power plants to continue operations past 2020. They were set to stop production as California transitions to cleaner energy sources. The extended deadline is expected to ease the strain on current systems while new energy and storage resources are being built.If an outage is planned for a neighborhood, SDG&E says they try to give all customers a heads up before the lights go out.How these rolling outages workRolling outages are a method that CA ISO uses to take the load off of California's power grid. When the state says the grid is under too much stress, each utility in the state has a percentage of electricity that needs to be taken off of the grid to meet whatever wattage CA ISO is aiming for, according to SDG&E. That amount that a utility will be asked to cut during these rolling blackouts is approved with CA ISO regulators every year.SDG&E determines which neighborhoods will be impacted by creating a list of blocks. Each of those blocks accounts for about 25 megawatts of electricity. Once CA ISO tells SDG&E how much power it needs to cut, SDG&E goes down that list from the top, de-energizing blocks until it is told to stop.The next day, the company picks up where it left off on the list, so that the same neighborhoods aren't affected every night. Once SDG&E goes through its entire list, it starts at the top again.Outages can last up to an hour but can also be relatively quick. Saturday, the first block de-energized lasted for about 17 minutes, according to the company.What you can do to helpTo avoid rolling blackouts, officials say the best way is to take energy conservation seriously. Because these outages are issued by the state, conservation is needed by all Californians in these instances.Officials recommend setting the thermostat at 78 degrees, turning off unnecessary lights and electronics, and using appliances before 3 p.m. to help save power.During power shutoffs, SDG&E suggests customers turn off air conditioners, keep refrigerator and freezer doors closed, and reduce their water use due to the need for electricity to pump and process water. For electric vehicle owners, charging should be delayed if possible until after the emergency shutoffs, SDG&E said.SDG&E offers more safety tips to keep in mind during an outage here. 3805

SAN DIEGO (KGTV) -- At least one San Diego woman is a part of thousands who've volunteered to participate in a human challenge trial to find a vaccine for COVID-19. April Simpkins is a healthy 29-year-old. Simpkins said she felt helpless watching as the pandemic spread around the world, until she heard about 1 Day Sooner while listening to a podcast. 1 Day Sooner is an organization that advocates for volunteers willing to participate in a human challenge trial. The trial means being infected with COVID-19 in hopes of speeding up the process for a vaccine. The trial is restricted to young and healthy people. So far, there is no plan for any human challenge trials to fight COVID-19, but over 30,000 thousand people, from over 140 countries, have signed up to volunteer. The hope is to have the list of volunteers ready, if and when such a trial is approved. The trial would still require approval from a type of medical ethics board and from the Food and Drug Administration. To find out more about 1 Day Sooner click here. 1038

SAN DIEGO (KGTV) - Could you feed yourself on about per day? The San Diego Hunger Coalition is encouraging San Diegans to take part in the annual CalFresh Challenge to raise awareness about food insecurity. CalFresh public assistance allots .07 daily in food benefits, according to SDHC. The system, known nationally as SNAP, helps those in need but it is insufficient for helping people meet basic needs, SDHC says. During the CalFresh Challenge, participants must spend no more than .35 for five days on all meals, drinks, and snacks. During the week, participants must not accept free food. San Diego Hunger Coalition wants participants to post about the experience on social media with the hashtag #CalFreshChallenge. Participants are also asked to donate to SDHC. 784

SAN DIEGO (KGTV) - Authorities are investigating a threat to the San Diego County Administration Center by a former county employee.The specifics of the threat and how it was made was not immediately clear but the threat was being taken "very seriously," Chief Administrative Officer Helen Robbins-Meyer said in a letter to county employees.The employee, who was not named, no longer works with the county.RELATED: San Diego Unified School District, San Diego police outline school safety effortsSan Diego Sheriff's Department was notified, made contact with the person, "and took appropriate action to minimize the threat." Despite this, they asked employees to remain vigilant and report any suspicious behavior."Deputies and security personnel at the CAC are familiar with the subject and are ready to address any concerns."In Robbins-Meyer's letter, she wrote the county is working with SDSO "on every legal means possible to prevent this individual from accessing County facilities." 1011

SAN DIEGO (KGTV) -- Authorities in California have identified the sailor who died after being struck by a spinning helicopter blade as 32-year-old Lt. James Mazzuchelli.Mazzuchelli was a flight surgeon assigned to Marine Light Attack Helicopter Squadron 267, Marine Aircraft Group 39 and was stationed at MCAS Camp Pendleton.Mazzuchelli is from Orange Park, Florida and was previously deployed to Japan.“Lt. James Mazzuchelli was an incredibly talented physician and Sailor,” said Col. Matthew Mowery, commanding officer of MAG-39. “His contagious enthusiasm, motivation, and love for the Marines and Sailors of HMLA-267 and MAG-39 has been evident in the outpouring of grief at his loss and the support being shown to his family and close friends. His willingness to join the Navy and elect to serve faithfully with the Marines should give a sense of pride to all of us who serve our country that we are surrounded by heroes every day. James and his contribution to our Corps will be sorely missed."The sailor died Saturday morning after being hit by the spinning tail rotor blade of a UH-01Y Venom Marine helicopter.The incident is currently under investigation. 1182

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