Very sorry to hear about your accident, hope you recover soon.

This sounds like a fluke due to the amount of rain, which you said is not normal, but I am sure you will be ready next time, or avoid the area. Get back on your bike when you are well and this is a warning for everyone to be aware of the unexpected when you have different conditions, such as rain in darkness. You made me think of the low spots on the routes I travel. Thanks for posting your story.