Cold weather is much deadlier than extreme heat, study says

Extreme heat waves like the one that killed more than 70,000 Europeans in 2003 may be the most visible examples of deadly weather, but cold days actually cause more deaths than hot ones, a new study says.

After examining more than 74 million deaths that occurred in 13 countries from 1985 to 2012, researchers calculated that 7.3% of them could be attributed to cold weather and 0.4% to hot weather.

In another counterintuitive finding, extreme weather — either hot or cold — was responsible for only 11% of the weather-related deaths, according to the studypublished Thursday in the journal Lancet.

“Heat stroke on hot days and hypothermia on cold days only account for small proportions of excess deaths,” the international research team wrote.

The researchers collected daily data on weather conditions, air pollution and deaths from 384 cities around the world. For each city, they calculated the temperature at which deaths were least likely to occur. All other days were compared to days with this “optimum” temperature .... http://www.latimes.com