When 2-month-old Isaac Enrique Sanchez was diagnosed with pyloric stenosis, a condition that causes vomiting, dehydration and weight loss in infants, his parents were told that their son's condition was curable. The problem was that no hospital in the Rio Grande Valley of Texas had a pediatric surgery team capable of performing the operation on his stomach.

In Mexico City and surrounding areas, rescuers are still searching for casualties and survivors of Tuesday's earthquake. More than 200 people are believed to have died.

Geologically speaking, Mexico City is not built in a very good place.

This is the second big quake in Mexico in less than two weeks. It came 32 years to the day after another deadly quake. And there will be more in the future, though when is anyone's guess.

When the fourth-graders in Mrs. Marlem Diaz-Brown's class returned to school on Monday, they were tasked with writing their first essay of the year. The topic was familiar: Hurricane Irma.

By the time I visited, they had worked out their introduction and evidence paragraphs and were brainstorming their personal experiences. To help them remember, Mrs. D-B had them draw out a timeline — starting Friday before the storm. Then, based on their drawings, they could start to talk about — and eventually, write about — what they experienced.