Electrical

Your first task is to identify which circuit breaker supplies which outside receptacle. Using a small lamp or tester, turn off breakers one at a time, and note which breaker controls each outlet. 

Make note of what each breaker controls.  You can do this on your electrial panel, or you may consider making a more detailed list on paper and store near panel.  This will help assess what outlets are at risk for flood waters.  (Consider doing the same for interior outlets and switches). 

Elevate any receptacles that can be.  Do this yourself or hire a licensed electrician. 

For receptacles that cannot be elevated, consider. 1) Permanently sealing the electrical box.
2) Seal any conduit feeds to the receptacle box.

3) Seal the plugs with caulk cord weatherstrip.

Identify any outside outlets that are 'fed' from an interior receptacle.  Typically a hole is bored through the wall for the electrical cable to go through.  If hole isn't sealed, seal it with silicone.

For pool pumps, convert to "plug-and-play".

1) Install weatherproof outdoor box and receptacle for each pump.
2) Replace the hard wired electrical cable with a suitable outdoor cable and plug connector.
3) Change the pump plumbing (PVC) lines to add a "disconnect" connection so that pumps can be disconnected and moved inside.

Add additional protection to outdoor receptacles.  1) Turn off power supply.

2) Replace wire nuts / connectors that have been filled with dielectric grease.

3) After securing, 'topped off with additional grease, if needed.

If your low-voltage outdoor electrical connections can't be raised higher, consider the following.

1) Protecting connections with dielectric grease or  waterproof silicone tape.

2) Adding a "No Flood" electric box cover.