Philippine sugar, or any sugar grown outside the US, rarely enters this country.
The US government puts huge import tariffs on foreign sugar in order to protect the American sugar producers.
When the supply of international sugar goes down and the prices go up, it does tend to affect US prices, since the demand to export US sugar goes up. Our domestic supply then goes down, and the consumer prices go up.
The Philippines produces a small percentage of the world's sugar, and it is usually priced quite high compared to Brazilian sugar.
The storm damage should not affect American prices, but the fire in Brazil just might. My advice is to stock up if you find a deal on sugar, just in case.
Michael