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What effects did the 1970 Bhola cyclone have on the Ganges-Brahmaputra delta?

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Map showing the course of the Brahmaputra River as it flows from southwestern China through northeastern India and into Bangladesh, with surrounding countries including Bhutan, Nepal, Myanmar, Pakistan, and Afghanistan labeled. The river's path is highlighted in blue, and major international boundaries are marked. — Brahmaputra River Brahmaputra River.

The 1970 Bhola cyclone, also known as the Ganges-Brahmaputra delta cyclone, was a catastrophic event that struck East Pakistan (now Bangladesh) on November 12, 1970. Its impact on the Ganges-Brahmaputra delta was devastating:12

Humanitarian Toll: The cyclone caused an estimated 300,000 to 500,000 deaths, primarily due to drowning. It remains one of the deadliest tropical cyclones in recorded history.1234
Physical Destruction: Accompanied by a storm surge of approximately 35 feet (10.5 meters), the cyclone flooded low-lying regions and flat islands at the mouth of the delta system. Entire villages were wiped out, with Bhola Island—the largest in the region—being among the hardest hit.14
Political Consequences: The failure of the West Pakistan government to provide sufficient aid in the aftermath of the disaster served as a critical catalyst for widespread protests and calls for independence in East Pakistan, ultimately contributing to the Bangladesh Liberation War the following year.143