The image is a photograph of a warning sign posted on a black metal fence. The sign is rectangular in shape and has red text on a white background. The text reads "WARNING ADVERTENCIA DURANTE Y DESPUES DE LLUVIIA" which translates to "WARNING during and after rain events" in English. Below the text, there is a red circle with a line through it, indicating that the area contains runoff. 

The sign also has a small illustration of a person swimming in the water. The background of the image shows a body of water, possibly a lake or river, with a cloudy sky above. The image appears to be taken from a low angle, looking up at the sign.