Volunteer Paula McCoart checks a dog at an animal shelter for tornado-displaced pets on May 23, 2013 in Moore, Oklahoma. Monday’s tornado in this Oklahoma City suburb damaged or destroyed 1,200 homes and affected 33,000 people, officials said Thursday. Updating figures from one of the worst US tornados in recent years, they said the death toll from the powerful twister -- which struck with little notice in mid-afternoon -- remains at 24, with 377 injured.

Volunteer Paula McCoart checks a dog at an animal shelter for tornado-displaced pets on May 23, 2013 in Moore, Oklahoma. Monday’s tornado in this Oklahoma City suburb damaged or destroyed 1,200 homes and affected 33,000 people, officials said Thursday. Updating figures from one of the worst US tornados in recent years, they said the death toll from the powerful twister -- which struck with little notice in mid-afternoon -- remains at 24, with 377 injured.