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Gerardo Ramirez, a central Texas dairy worker, was near his home but taking an unusual route to a children’s hospital in April when he drove his Volkswagen Jetta into a flooded section of road, not seeing in the pre-dawn dark that heavy rains had turned a tiny creek into a death trap. Ramirez survived, but his wife and two children drowned.In March, 800 miles away in Lee County, Alabama, 23 people ranging in age from 6 to 93 were killed in a 170 mph tornado — despite an evacuation warning by local authorities just like ones that many residents had heeded in previous storms this year. (Henderson, 7/9)

Stem cell therapies have the potential to treat many conditions, but so far there’s little proof that they do. Even so, clinics around the world offer stem cell-based treatments for a host of medical problems. New research warns that some of these treatments might not be effective and can, in fact, cause harm — sometimes many years down the line. (Flaherty, 7/11)

When Nicole Thibault had her first child, she imagined traveling everywhere with him. But by age 2, he would become upset by simply passing a restaurant that smelled of garlic. Waiting in line elicited tantrums and crowded places overwhelmed him. Autism was diagnosed within the year. “I thought maybe our family dream of travel wouldn’t happen,” said Ms. Thibault, 46, of Fairport, N.Y., who now has three children. But she spent the next three years learning to prepare her son for travel by watching videos of future destinations and attractions so that he would know what to expect. (Glusac, 7/11)

Many people spend hours on the internet every week -- but some people can't pull away. For individuals with internet addiction, there's a type of short-term therapy that can be an effective treatment, according to a small study published Wednesday in medical journal JAMA Psychiatry. Researchers found that 69.4% of men with internet addiction entered remission if they received short-term cognitive behavioral therapy, compared to 23.9% of men who entered remission while being on a waitlist to receive therapy. (Nigam, 7/10)

Many people who die of sudden cardiac arrest may have had a heart attack earlier in life without ever realizing it, according to a new study. In the study, almost half -- 42.4% -- of people who had no prior knowledge of coronary artery disease, but died of sudden cardiac arrest, showed signs of having had a prior silent heart attack. The study published Wednesday in the journal JAMA Cardiology. (Howard, 7/10)

President Donald Trump promised that he would renew the coal economy, but we can see that he’s no match for the free market. And now politicians should turn their attention back to what they will do to help coal miners through these last painful throes of a post-coal economy. (Blackford, 7/10)

Even moderate levels of air pollution can cause lung function impairment that rivals the damage caused by smoking, a new study found. Researchers studied 303,887 British men and women, with data on lung health gathered by physical examination and air pollution statistics geographically coded to the participants’ home addresses. (Bakalar, 7/10)