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A tornado tossed trees into homes, tore off storefronts and downed power lines but killed no one in a densely populated area of Dallas, leaving Mayor Eric Johnson to declare the city “very fortunate” to be assessing only property damage.A meteorologist said Monday that people took shelter thanks to early alerts, and that it was fortunate the tornado struck Sunday evening, when many people were home.Full Coverage: 429

According to the Consumer Product Safety Commission, more than 8,000 Americans end up in the hospital annually this time of year due to a firework-related accident. According to the commission, the majority of the injuries are to the hands and head. Of the injuries, eight were fatal in 2017. Children younger than 15 years of age were responsible for 36 percent of the firework-related hospital visits in 2017. According to a June 2018 report from the Consumer Product Safety Commission, the majority of the injuries were due to misuse or malfunctions of fireworks. "Misuse included: igniting fireworks too close to someone; lighting fireworks in one’s hand; setting off fireworks improperly; having lit fireworks too close to other fireworks/explosives; and touching lit fireworks," a previous report states. "Typical malfunctions included: errant flight paths; early or late ignition; tip-over incidents; and blowout. In addition, debris from fireworks was involved in some of the injuries."Even though sparklers are legal in many jurisdictions, one of the fatalities was from a sparkler.Homemade and altered fireworks accounted for 3 percent of firework injuries. With a few simple precautions, you can stay safe this July 4. Here are 10 tips from the Consumer Product Safety Commission to help you avoid the emergency room. Never allow young children to play with or ignite fireworks.Avoid buying fireworks that are packaged in brown paper because this is often a sign that the fireworks were made for professional displays and that they could pose a danger to consumers.Always have an adult supervise fireworks activities. Parents don't realize that young children suffer injuries from sparklers. Sparklers burn at temperatures of about 2,000 degrees - hot enough to melt some metals.Never place any part of your body directly over a fireworks device when lighting the fuse. Back up to a safe distance immediately after lighting fireworks.Never try to re-light or pick up fireworks that have not ignited fully.Never point or throw fireworks at another person.Keep a bucket of water or a garden hose handy in case of fire or other mishap.Light fireworks one at a time, then move back quickly.Never carry fireworks in a pocket or shoot them off in metal or glass containers.After fireworks complete their burning, douse the spent device with plenty of water from a bucket or hose before discarding it to prevent a trash fire.Also keep in mind different jurisdictions have varying laws involving fireworks. 2522

A study from the National Institutes of Health claimed that permanent hair dye and chemical hair straighteners could increase the risk of breast cancer among women. The study published online on Dec. 4 in the International Journal of Cancer found that women who used permanent hair dye and chemical hair straighteners were 9% more likely to develop breast cancer than those who did not. The NIH used a sample size of 46,709 women. Researchers stressed that there was little to no increase in breast cancer risk for semi-permanent or temporary dye use."Researchers have been studying the possible link between hair dye and cancer for a long time, but results have been inconsistent," said corresponding author Alexandra White, Ph.D., head of the NIEHS Environment and Cancer Epidemiology Group. "In our study, we see a higher breast cancer risk associated with hair dye use, and the effect is stronger in African American women, particularly those who are frequent users. "While the study suggests an increased risk for women, these results need to be replicated in other studies to make a conclusion, the NIH said. When asked if women should stop dyeing or straightening their hair, co-author Dale Sandler, Ph.D., chief of the NIEHS Epidemiology Branch, said, "We are exposed to many things that could potentially contribute to breast cancer, and it is unlikely that any single factor explains a woman’s risk. While it is too early to make a firm recommendation, avoiding these chemicals might be one more thing women can do to reduce their risk of breast cancer." 1576

A student gunman opened fire at a southern California high school Thursday morning, leaving two dead and several others injured, officials said.According to authorities, the male suspect, who is a student at the school, opened fire in the quad at Saugus High School in Santa Clarita around 7:38 a.m. before classes started. Authorities were on scene by 7:40 a.m. after receiving several 911 calls about the shooting. The suspected gunman shot and killed two students, a 16-year-old female a 14-year-old male, and injured three others before shooting himself in the head, police said. He is currently in custody and being treated at a local hospital, according to Los Angeles County Sheriff Alex Villanueva. Officials say he is in grave condition.Video obtained at the scene showed the suspect taking a .45-caliber semi-automatic pistol from a backpack before shooting the five other students and then himself, said Capt. Kent Wegener of the Los Angeles County Sheriff's Department.The other victims include two females, ages 14 and 15, and a 14-year-old male, police said. They were transported to local hospitals with gunshot wounds.Police are investigating the alleged shooter's home, which is near the school, authorities said at a press conference. Officials also said that Thursday was the student gunman's 16th birthday.The suspected shooter's mother and girlfriend are being interviewed by detectives. Other student witnesses are also still providing information to police.Other schools in the district were placed on lockdown amid the shooting. Police say they still don't have a motive in the shooting.EDITOR'S NOTE: A previous version of this story said that three people were killed based on a report from ABC News. ABC News is no longer reporting that three students have died, and this story has been updated to reflect ABC's reporting. 1862

After one of its cars made a high-speed run on a German test track, Bugatti says it is the first production auto manufacturer to make a car that exceeded 300 miles per hour.A specially modified Bugatti Chiron, driven by Bugatti test driver Andy Wallace, went 304.8 miles per hour on a 5.5 mile straightaway on Volkswagen's Ehra-Lessien test track in Germany, the company said. Bugatti is owned by the Volkswagen Group, which also owns Lamborghini and Bentley.Bugatti is a "production auto manufacturer," meaning it makes multiple copies of the same car for use on public roads albeit, in Bugatti's case, in low numbers and at very high prices. But this was not the ordinary sort of Chiron one can buy for million from the Bugatti factory in Molsheim, France. This record was set by a prototype Chiron that Bugatti developed in cooperation with the Italian race car manufacturer Dallara. (Cars built solely to compete for speed records have gone as fast as over 500 miles per hour.)In addition to making safety alterations for such high speeds, the companies modified the car's body to improve aerodynamics. The tires were also specially developed by Michelin, which makes the tires for regular Chiron cars as well. The tires are still legal for road use but they were reinforced to withstand these extremely high speeds."It's inconceivable that a car would be capable of this. But the Chiron was well 1416

来源：资阳报