They are unlikely to be the type of maggots from houseflies/bluebottles, that feed on dead meat/rotting food.
These will be the larval form of some fly or beetle (yes, thats what maggots are, lots of creatures have a rather maggoty larval form), that lives just under the soil and feeds on roots or crawls out at night to feed.
The heavy rain, both the waterlogging and the percussive effect on the ground drives them out in massive numbers particularly if that rainfall coincides with them being ready to pupate (which a lot of species will be right about now).
They're seeming to try to come up the path, up your door etc as they're desperate to get out of the water or they'll drown. So they seek higher ground, dryer ground etc.
The type of maggots that eat rotting meat etc will never be far from a corpse or other food source, they can't survive. If the food source is all gone they pupate or just die, they don't leave en masse to look for more, so you can rule out that sort of maggot.
As lots of species have very similar looking larval forms the only way to find out truly what they are would be to keep some, feed them til they pupate and then wait for them to emerge. I assume you won't be bothering!