According to Honda, the fuel-pump roll-over valve might have been damaged during production, and if an affected vehicle is in a rollover crash, the valve might allow fuel to leak into the evaporative emissions canister. Honda doesn't even speculate that this would increase the chance of a fire—and associates no crashes, injuries, or fatalities with the issue—though it would of course affect the vehicle's emissions system.
In all, 18,056 vehicles are being recalled; not all of those vehicles are affected, though dealerships will inspect and potentially replace the fuel pump module, which is inside the gas tank.
The automaker will begin notifying owners of the recall in mid-April, by mail, and all owners are encouraged to bring their vehicles to the dealership as soon as they receive that. To see if your vehicle might be one of the vehicles potentially affected, you can also go to www.recalls.honda.com, or call 800-999-1009.