According to the latest reports, Rita is heading in their general direction. Hopefully by the time it reaches them it would have decreased to a tropical depression, but conditions will still be pretty windy.
They live on a hill - so there's no chance of flooding for them (125 metres / 410 ft above sea level). But they do live in a mobile home - so there's a chance that they may suffer major wind damage. They're not evacuating because all the filling stations have run out of petrol/gasoline and they have pets.
Bob & Sally aren't Christians BTW.
Rather than asking you to pray and for you to not do it (which is what I'm guilty of when I read bloggers asking for prayer), how about you just pray the following silently:
Dear Heavenly Father,Thanks
We pray for Bob and Sally as this Hurricane bears down on them. We ask that you protect their lives and protect their home from being too badly damaged. Help them in this time to pray and to place their trust in you. We ask that if their home is damaged, that you will provide them with the means of repairing it soon. We ask also that they will open their home and the hearts to anyone they can help in this crisis. Please protect their lives, and give them the means to endure. Amen.