1824 St. Petersburg flood
The 1824 St. Petersburg Flood occurred in 1824 killing several hundred people. It was the deadliest flood in the history of Russia and St. Petersburg. The water level peaked at 421 centimetres at 14:00 (2 PM), the highest recorded floodwaters in Russian history. References 

Floods in Russia
19th-century floods in Europe
1820s floods
1824 natural disasters
St. Petersburg flood
1824 disasters in the Russian Empire