NEW YORK (CNNMoney.com) - One of President Bush's top economic advisers said Friday that gasoline prices are still too high, even though they have fallen from record highs earlier this year.

"Despite the fact that gasoline prices have obviously fallen dramatically from where they peaked after (Hurricane) Katrina, they are still too high," economic adviser Al Hubbard said Friday. "He (Bush) is especially concerned about natural gas prices and the impact they're going to have on people's budgets this winter."

The national retail price for regular unleaded gasoline fell over the last week to an average $2.15 per gallon, the lowest since late June, the government's energy forecasting agency said Monday.

The pump price has dropped 92 cents, or almost 30 percent, since reaching a record high of $3.07 a gallon in early September after Hurricane Katrina damaged oil refineries along the Gulf Coast and disrupted fuel supplies.

Prices at the pump continued their modest declines Friday, according to travel club AAA, with the nationwide average price for regular unleaded falling by less than penny to $2.129 a gallon.

Regular unleaded prices are still up nearly 10 percent from an average $1.936 a gallon a year ago, according to AAA.

The Department of Energy's Energy Information Administration predicted a jump in Americans' heating bills this winter in an October report, due to slightly colder temperatures and the lingering effects of hurricanes Katrina and Rita.

The government agency anticipated that the average cost to heat a home with natural gas this winter to climb by 47.6 percent to $1,096 and by more than two-thirds to $1,242 in case of colder-than-expected weather.

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