Satellite images from Maxar Technologies show Nomuka in the Tonga island group on Aug. 17, 2020, L, and Jan. 20, 2022, R, showing the damage after the Jan. 15 eruption.

Video. Australia and New Zealand deliver aid to Tonga after volcano eruption

Tackling a lack of clean water is a priority because supplies have been disrupted by layers of volcanic ash and salt water.

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