One of the most powerful earthquakes ever recorded in Mexico and a raging hurricane dealt a devastating one-two punch to the country, killing at least 64 people as workers scrambled to respond to the twin national emergencies. The 8.1 quake off the southern Pacific coast just before midnight Thursday toppled hundreds of buildings in several states. Hardest-hit was Juchitan, Oaxaca, where 36 people died and a third of the city's homes collapsed or were uninhabitable, President Enrique Pena Nieto said late Friday in an interview with the Televisa news network. In downtown Juchitan, the remains of brick walls and clay tile roofs cluttered streets as families dragged mattresses onto sidewalks to spend a second anxious night sleeping outdoors. Some were newly homeless, while others feared further aftershocks could topple their cracked adobe dwellings. "We are all collapsed, our homes and our people," said Rosa Elba Ortiz Santiago, 43, who sat with her teenage son and more than a dozen