There may be holes in the tent where the water can flood into
storm, flood
Depends On the type of flood. A regular flood is caused by A storm, yes. But, Flash flood is something that appears on the radar with no warning.
A flash flood.
A storm with no rain
I can save myself from a flood storm by taking shelter into a higher and strong building .
A waterproof tent is a good tenting product to use in the rain. The tent should repel the rain, and not let the rain soak through.
The rain tent cover is highly effective in protecting against heavy rainfall and keeping the interior of the tent dry.
It can depend on the amount of rain received. The more rain, the more severe the flood is.
A brief period of rain is called a drizzle. This is the opposite of a flood or a storm where there is too much rain for long periods.
Flood
That would be a downpour, possibly resulting in a flood. Synonyms include, but are not limited to, deluge, monsoon, storm, rainstorm, cloudburst, inundation, torrential rain, drencher, and frog-strangler.
After a heavy rain, or in the spring when the snow melts.