PEREIRA, Colombia (AP) — Rescue crews and civilians in Colombia painstakingly searched through rubble Tuesday in the hopes of finding survivors trapped under debris after a powerful earthquake left thousands missing in dozens of cities and towns.

The 7.4 magnitude earthquake that hit western Colombia on Monday wreaked havoc, collapsing buildings, buckling roads, crushing cars and leaving devastated residents to console each other among the wreckage of their homes. Excavators and heavy machinery cleared heavy chunks of concrete, while buckets of rubble were passed hand-to-hand along a line of volunteers.

WATCH: 7.4-magnitude earthquake rocks Colombia, crumbling homes and buildings

Rescue crews and volunteers picked through flattened concrete buildings in affected cities, searching for signs of life. They raised their hands to call for silence when they thought they heard someone beneath the piles of debris. At least one woman was retrieved — alive — from the rubble.

Colombian President Abelardo de la Espriella said the earthquake killed at least 181 people and left 2,595 more injured. He said at least 195 remained missing, but civilian-run databases suggest that number could be closer to 4,000.