If you know you will be on the wet side of a storm with a ton of rain, hook up a manual vacuum head to the skimmer and leave it on the bottom of the pool, even if you have a functioning main drain. Drop the water level in the pool 3 or 4 inches. The vacuum head at the bottom of the pool should keep the pump from losing prime as the water level drops. Bring the FC to slam level. Stock up on bleach, enough to maintain a slam for 2 weeks and store it out of the weather. Cover the pool if you have the type that is anchored in concrete. If you normally use water bags to hold a winter cover in place it probably won't hold up in the storm. After the storm uncover the pool and test your water. If the water is clear and test results are good then you can maintain as normal. If the power is out brush the pool to mix in the chlorine. While power is out test daily, add chlorine to maintain regular FC levels, and brush.
If you don't have a winter cover don't run out and buy one, just know that you will have a lot of debris in the pool. You may want to invest in an extra pool pole and leaf rake to help with clean up. If your pool turns black after the storm you will be able to slam it back to health once you clear all the debris out of the pool. Mine turned black during Ike. It was beautiful when we left and 3 days later it was black and full of debris. Slamming took about a week after all the debris was removed.