AP Residents walk among the rubble of building damaged in earthquakes the previous day in Catia La Mar, Venezuela on Thursday.

LA GUAIRA, Venezuela — Venezuelans searched for survivors beneath collapsed buildings Thursday and rescue teams raced to northern areas rocked by a pair of powerful earthquakes that officials say killed at least 188 people and left more than 200 trapped.

More were feared dead from the 7.2- and 7.5-magnitude earthquakes that struck Wednesday evening — among the strongest in Venezuela in more than a century and felt throughout the region. Some 1,500 people were injured, thousands were reported missing and buildings were evacuated as far away as Brazil’s Amazon.

In response to the devastation, the U.S. Treasury on Thursday moved to waive some sanctions until Oct. 23 to allow transactions related to earthquake relief efforts in Venezuela that would otherwise be prohibited.

Meanwhile, in cities across northern Venezuela, panicked residents poured into the streets and searched for the missing in the debris.

The injured were pulled out of the rubble covered in dust and blood, among them children and animals. Venezuelan state TV showed dramatic images of rescues, including a woman who was trapped under a cement slab, only a barefoot poking out before crews managed to get her out alive. But few government search teams were scene outside Caracas.

Dayana Delgado, mother of three children, asked where the heavy machinery was that government officials had promised, pointing out that neighbors were the ones digging through the rubble.

“I want to know where my child is, if he’s trapped or in a shelter,” she said of her 8-year-old son who was missing.

One mother sobbed and collapsed in grief as the bodies of her 3- and 10-year-old children were wrapped in blankets and carried away. Others screamed the names of missing loved ones. Some stood in silent shock.

The coastal region of La Guaira — north of the capital, Caracas — suffered some of the heaviest damage and casualties. The country’s main airport is there and was closed due to damage, complicating aid efforts.

Retired schoolteacher Juan Alberto Mendaño climbed through wreckage in La Guaira and past a dead body when he spotted a woman who was trapped and signaling with her hand for help.

“May God rescue her as quickly as possible,” said Mendaño. “When we heard the scream, there was nothing we could do.”

Offers to send aid and supplied poured in from around the world, including from the United States, which seized Venezuela’s then-president Nicolas Maduro at the beginning of the year in a surprise military operation.

The natural disaster is just the latest challenge for acting President Delcy Rodríguez, the former vice president who took office in January after Maduro’s capture. Venezuela has been facing economic disarray for more than a decade, and many people reject the legitimacy of the political movement Rodríguez represents.

Venezuelan authorities said they were diverting rescue teams from other parts of the country to La Guaira, which is no stranger to natural disasters; a 1999 mudslide there, considered one of the country’s worst natural disasters, killed thousands.

Rodríguez appealed to businesses Thursday to make heavy construction equipment available for rescue operations.