2. A smell of fish or urine at home for no apparent reason
If you can’t detect the source of the smell, it is probably electric wires melting.
This situation can lead to a fire or even an explosion. The best option is to cut off the electricity until the cause has been clearly found.
3. Rip current
If you accidentally find yourself in a rip current, it is completely useless to swim against it to the shore — you will only waste your energy. Try to swim parallel to the shore until you exit the current, and only then swim toward the shore.