INFANTS or young children left inside a vehicle can die of hyperthermia in a few hours, even when the temperature outside is not especially hot. It is a tragedy that kills about 30 children a year, according to the National Safety Council.

Making the deaths all the more tragic, perhaps, is that many are a result of forgetfulness rather than neglect, occurring when distracted but otherwise responsible parents or caretakers inadvertently leave a child in the car.

Newspaper articles and campaigns by safety advocates had brought some attention to the problem, but its visibility grew when a March 2009 article by Gene Weingarten in The Washington Post Magazine, “Fatal Distraction,” asked whether the mistake of forgetting a child in the back seat of a car was also a crime. The article won the 2010 Pulitzer Prize for feature writing.

Is increased awareness enough to prevent these tragedies, which are more likely now that children ride in back seats to avoid injuries that could result from an air bag deployment? Or would a technical solution from automakers be a better approach?