Mexico City

Updated at 7:45 p.m. ET

As the morning sun rose over the cities of Central Mexico on Wednesday, where city blocks had lain neatly arranged, there was now a mess of rubble and stunned residents, watching as thousands of earthquake volunteers and rescue workers dug through scattered stones searching for signs of life.

The 7.1 magnitude quake struck Tuesday in Puebla state, some 75 miles from Mexico City, but it devastated a vast expanse of the country. Mexican authorities put the death toll at 230.