A view of Mount Etna, as the volcano continues to erupt, seen from Milo, Italy, February 28, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 22, 2021. Picture taken February 22, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Workers clean a street in the aftermath of an impressive Mount Etna volcanic eruption in Catania, Italy, February 17, 2021. REUTERS/Antonio Parrinello

Workers clean a square in the aftermath of an impressive Mount Etna volcanic eruption in Catania, Italy, February 17, 2021. REUTERS/Antonio Parrinello

A woman walks her dog in the aftermath of an impressive Mount Etna volcanic eruption in Catania, Italy, February 17, 2021. REUTERS/Antonio Parrinello

A woman walks her dog in the aftermath of an impressive Mount Etna volcanic eruption in Catania, Italy, February 17, 2021. REUTERS/Antonio Parrinello

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Fornazzo, Italy, February 3, 2021. Picture taken February 3, 2021. REUTERS/Antonio Parrinello

Volcanic ash covers the roof of a car during an eruption of Mount Etna in Fleri, Italy, January 19, 2021. REUTERS/Antonio Parrinello

A car is covered with volcanic ash during an eruption of Mount Etna in Fleri, Italy, January 19, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo, under the volcano, Italy, January 19, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo, under the volcano, Italy, January 19, 2021. REUTERS/Antonio Parrinello

Lava flows from Mount Etna during an eruption, as seen from the small village of Fornazzo, under the volcano, Italy, January 18, 2021. Picture taken January 18, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo, under the volcano, Italy, January 18, 2021. Picture taken January 18, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo, under the volcano, Italy, January 18, 2021. Picture taken January 18, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, as seen from Zafferana, Italy, January 18, 2021. Picture taken January 18, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from a church in the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello

An eruption from Mount Etna lights up the sky during the night, seen from the small village of Fornazzo under the volcano, Italy, January 13, 2021. Picture taken January 13, 2021. REUTERS/Antonio Parrinello

A plant starts to grow at the Taal Volcano island, a year after the volcano erupted, in Batangas province, Philippines, January 12, 2021. REUTERS/Lisa Marie David

Damaged trees are seen covered with ashes at the Taal Volcano island, a year after the volcano erupted, in Batangas province, Philippines, January 12, 2021. REUTERS/Lisa Marie David

A fisherman eats while feeding his cats at the Taal Volcano island, a year after the volcano erupted, in Batangas province, Philippines, January 12, 2021. REUTERS/Lisa Marie David

An animal skull lies on the ground at the Taal Volcano island, a year after the volcano erupted, in Batangas province, Philippines, January 12, 2021. REUTERS/Lisa Marie David