Residents leave Goma, Congo, by boat on Lake Kivu Thursday, May 27, 2021, five days after Mount Nyiragongo erupted. Evacuation orders were given for most of the town, fearing further eruptions and tremors. (AP Photo/Moses Sawasawa)

Traffic clogs a main road as residents try to flee Goma, Congo, Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted. Evacuation orders were given to most of the town, fearing further eruptions and tremors. ( AP Photo/Moses Sawasawa)

Residents flee Goma, Congo Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted . A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Residents flee Goma, Congo Thursday, May 27, 2021, five days after Mount Nyiragongo erupted. A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Residents flee Goma, Congo Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted . A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Residents flee Goma, Congo, by boat Thursday, May 27, 2021, five days after Mount Nyiragongo erupted. A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Residents carry belongings as they flee Goma, Congo, Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted. Evacuation orders were given for most of the town, fearing further eruptions and tremors. (AP Photo/Moses Sawasawa)

Residents flee Goma, Congo Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted . A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Residents flee Goma, Congo Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted . A new eruption could occur at any moment, the military governor of Congo's North Kivu province, Lt. Gen. Constat Ndima Kongba, announced early Thursday. He ordered the evacuation of 10 of the 18 neighborhoods in the city of 2 million people. The center of Goma, which was spared when the volcano erupted last week, is now under threat, with activity being reported near the urban area and Lake Kivu, Kongba said. (AP Photo/Moses Sawasawa)

Traffic clogs a main road as residents try to flee Goma, Congo, Thursday, May 27, 2021 , five days after Mount Nyiragongo erupted. Evacuation orders were given for most of the town, fearing further eruptions and tremors.(AP Photo/Moses Sawasawa)