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SAN DIEGO (KGTV) — Nearly three-quarters of the students in San Diego County are currently learning from home, and those numbers don’t make a lot of sense to MIT professor Martin Bazant.Bazant is one of the creators of the COVID-19 Indoor Safety Guideline. The free online tool simulates the fluid dynamics of respiratory droplets in various kinds of rooms to show users the risk of different indoor environments.“If you run the numbers for a typical classroom, especially if the students and the teachers are wearing masks, then the amount of time in the room can be very significant,” Bazant said. “Essentially those people could spend a week in the classroom and not have a problem.”Bazant says the six-foot rule that has largely determined which businesses can stay open is overly simplistic. In some cases, he says the rule creates a false sense of security. In other situations, he says it causes the closure of businesses or schools that could safely operate.“If you place nursing home beds six feet apart in a shared room, they are absolutely not safe,” he said. But he said well-ventilated classrooms, with teachers and students in masks, are another story.“It's only the United States where we follow the six-foot rule. That's given by the CDC. The World Health Organization all along has been saying one meter, which is about three feet. If you simply followed the one-meter rule, all our schools would be open, as they are in most of the world right now,” he said.Bazant and his colleague John Bush said they set out to design a tool that would reveal the risk of transmission based on science, not guesswork.Users start by selecting a room type, like a classroom or an airplane. From there, they can control a wide array of variables to dial in the risk, like the room size, the ceiling height, and the ventilation and filtration systems.From there, users can further tune the model by human behavior. How many people are in the room? Are they whispering, shouting or singing? How many are wearing masks?Mask usage is a critical component, Bazant says. The model quickly reveals the challenges of maskless activities in rooms with poor ventilation. Put five people without masks in a 400 square foot room with closed windows, and it becomes unsafe after 33 minutes.Bazant says studies on super spreader events show in indoor environments, the distance from an infected person doesn’t matter. Infected droplets spread and mix throughout the room like second-hand smoke from a cigarette.But with masks trapping droplets and diverting them upwards like a chimney, an environment like an airplane could be safe for several hours, according to the model. With more than 95% of the passengers and crew wearing surgical masks, a Boeing 737 could support 200 people -- around full capacity depending on the configuration -- for 18 hours. 2850

SAN DIEGO (KGTV) - One of San Diego’s oldest homes is for sale for ,595,000 in the North Mission Hills neighborhood.The home at 1803 West Montecito Way was built in the early 1900s and has period light fixtures and hardwood floors.With a brick-lined yard and mature trees, the new buyer will have a sanctuary in the heart of the city.HOUSE TOUR: Old-world charm in Mission Hills home for saleThe listing agents are Francine Finn and Catherine Black of Pacific Sotheby’s Realty.1803 West Montecito WayBedrooms: 4Full baths: 2Partial baths: 1Square feet: 2,032 568

SAN DIEGO (KGTV) - More than 100 migrants detained in Texas were flown to San Diego's Lindbergh Field Friday for processing due to a backlog in the Rio Grande Valley sector, U.S. Border Patrol officials said. “Currently, ICE aircraft are providing flights from RGV Sector to Del Rio and San Diego Sectors. We are also transporting individuals from Yuma Sector to El Centro Sector and from the Rio Grande Valley Sector to the Laredo Sector by bus. These are additional steps DHS is taking to mitigate the challenges posed by the unprecedented number of people in CBP custody,” said Theron Francisco, Acting Supervisory Border Patrol Agent. Once in San Diego, the migrants were transported from the airport to the Border Patrol’s Brown Field Station in the South Bay. According to acting San Diego Border Patrol Chief Doug Harrison, the migrants will go through general processing and screening, with the hopes of adhering to the national 20-day detention rule. The detention rule states migrant families cannot be held in detention for more than 20 days. After the initial screening at the border station, Immigration and Customs Enforcement will take over processing. Prior to the Texas-to-San Diego transfer, the selected migrants -- most of them being families -- went through health screenings to determine if they were healthy enough for travel. Harrison said there will be three flights per week, with the planes being ICE-contracted commercial charter flights. Harrison added the Rio Grande Valley facility is 200 percent over capacity, making the transfer of migrants to San Diego necessary. “We got to give the people in Rio Grande Valley some relief,” he said. In addition to San Diego, Harrison said it’s possible that migrants from Texas could be transferred to border stations in Detroit, Buffalo and Miami. According to Harrison, as of May 10, border agents have apprehended over 500,000 migrants who have entered the U.S. illegally -- an average of over 4,500 per day. 1991

SAN DIEGO (KGTV) — More rain arrived in San Diego Wednesday, less than a week after a storm swept through the county, leaving some areas flooded and city crews preparing for the wet weather.In Coronado, on First Street, crews worked to clear pipes near the shoreline. This is a large reason for flooding in the area. Public Services Director, Clifford Maurer, says flooding comes after sand and sediment gets into the storm drain from the high tides.“Some of the outfalls, the pipes that go into the bay or into the open waters have flapper valves on them. So they only allow water to go out, not come in,” says Maurer. “But when the water is above those valves there’s nothing you can do. There’s just nowhere for the water go."RELATED: Check out your daily forecastThe City of Coronado is also offering sandbags to residents. The bags are already filled and can be picked up at four different locations around the island.The City of San Diego is also preparing for the rain. Crews have signs and barricades already lined up in Mission Valley, an area frequent to flooding.Crews are placing bypass pumps in area they expect to flood. “Bypass pumps help relieve some areas of our system that may be overwhelmed with stormwater,” says Anthony Santacroce.RADAR: Live updating San Diego radarFifteen two-person crews that will be out patrolling areas within the city, looking for any storm damage or flooding.Both cities suggest homeowners should make sure the storm drains near their homes are clear of debris, so it doesn’t get swept in with the rain. 1558

SAN DIEGO (KGTV) - On Monday evening, a city official put inspection tags the doors of the Barrio Logan warehouse where a platform collapsed this weekend, injuring 21 minors and a few adults. It happened Saturday night at Vault PK parkour gym on Main Street. The facility is closed until further notice.RELATED: Structure collapses at Barrio Logan parkour centerOn Monday, inspectors with the city of San Diego toured the warehouse as part of their investigation, which is still in its preliminary stages. A city spokesperson told us there are "definite code violations" and permit issues, but no further details were released. Cal/OSHA was notified of the incident but is not investigating since no workers were injured. Team 10 verified that Vault PK's business license became active in July. On the gym's Facebook page, it appears the owner posted in June that her father and brother were working on much of the construction of the gym. RELATED:?Investigation underway in platform collapse at San Diego parkour gymMonday afternoon, Team 10 spoke to a local father whose wife, son and daughter were at the gym at the time of the collapse. He didn't want his name used but said his son sustained injuries to his foot and his wife has a broken foot. He says his 16-year-old daughter is still in the hospital with a broken pelvis and broken arm. There's no word on when she'll be released.The father says he was at the parkour gym a few days before the incident and told us the facility appeared like it didn't meet proper safety standards.Vault PK also operates a facility in Torrance and told Team 10 investigator Jennifer Kastner the gym is closed for inspections. 1719

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