April 27 1791 born Samuel Finley Breese Morse

 Samuel Finley Breese Morse ( 1791 – April 2, 1872) was an American contributor to the inventiontelegraph system based on European telegraphs, co-inventor of the Morse code, and an accomplished painter.
An important application is signalling for help through SOS, "· · · — — — · · ·". This can be sent many ways: keying a radio on and off, flashing a mirror, toggling a flashlight and similar methods.
In the Addams family, hero of the film in the form of separated hand, in case of emergency conveys hismessage, tapping them in Morse code.

Due to an excess danger this knowledge is useful and nowadays...---...

At least 95 people have died in the Brazilian state of Rio de Janeiro after the most torrential rain for decades caused landslides and flooding.

At least 10 people have been killed in the US state of Arkansas as storms and tornadoes careered up a swathe of the central United States.
And Mississippi Flooding...
 Оnly amphibious military hovercraft can travel on the destroyed roads and deliver food and medicines and to evacuate large groups of people.

If you havent hoverkraft, you need to train swimming in mud... as in England 
Maldon Mud Race organisers eye permanent Easter date
Good result of training  is when You can resist the flooding as ants