Search and rescue teams are racing against time across western Colombia after a powerful earthquake killed at least 132 people and left thousands missing, authorities say.

The magnitude 7.4 quake struck on Monday, rattling Cali, Quibdo, Pereira and dozens of other cities and towns. About 1,600 buildings have been reported damaged or collapsed, with soldiers, emergency crews and residents working side by side, passing chunks of concrete by hand as they search for survivors under the rubble.

Families are posting details of missing relatives on citizen-run websites; by Monday night more than 2,700 people had been reported missing. In El Cairo, near the epicentre in San Jose del Palmar, local officials say 80 percent of the town, home to about 7,000 people, has been damaged. Many of its traditional houses, made of sticks and mud, crumpled in the tremors.

President Abelardo de la Espriella, facing his first major crisis since taking office on Friday, has deployed “the entire military and police apparatus”, sending engineers, rescue teams and search dogs into the worst-hit areas. The US has pledged $15.5m in emergency aid, as regional governments also offer support to one of Colombia’s poorest and most isolated regions.