ALLSTATE CORP 
Harvey, which made landfall late on Friday as the most powerful hurricane to hit Texas in more than 50 years, has killed at least two people. It has since hovered around Texas' Gulf Coast, where it is forecast to remain for several more days.
On Wall Street, shares of companies likely to benefit from rebuilding efforts in the region advanced.
Home Depot (>> Home Depot (The)) climbed 1.0 percent to $151.21, while competitor Lowe's Companies (>> Lowe's Companies) gained 0.5 percent to $73.73. Power generator manufacturer Generac (>> Generac Holdings Inc.) slipped 1.24 percent to $38.11 after hitting a three-week high of $38.99.
"Home Depot will most certainly see a financial benefit from Hurricane Harvey, just as it did from Hurricane Sandy back in 2013," said Neil Saunders, managing director of GlobalData Retail.
"The impact of Harvey should, however, be even greater both because of the scale of the storm and because since 2013, Home Depot has widened its appeal to the professional segment of the market."
Shares of building material maker USG Corp (>> USG Corporation) jumped 4.5 percent to $27.96. The stock was on track for its best day since Nov. 10.
REFINERS, INSURERS
U.S. gasoline prices hit two-year highs as massive flooding triggered by the storm forced refineries in the area to close. That sent oil refiners' stocks higher, with Phillips 66 (>> Phillips 66) up 0.2 percent to $83.62 and Valero Energy (>> Valero Energy Corporation) 1.2 percent higher at $68.47.
The S&P 1500 oil and gas refining index <.SPCOMENRM> jumped 1.94 percent.
U.S. crude futures fell as refinery shutdowns could reduce demand for American crude, while gasoline prices were expected to rise and help mitigate any repair costs.
"Refining is where it is at, because that is where you have pricing power. This just underscores the significance of that pricing power," said Peter Kenny, senior market strategist at Global Markets Advisory Group, in New York.
"It is unfortunate and very unwelcome but an event like this just really drives that home."
Other companies expected to be affected include those in the insurance sector, auto manufacturers and food retailers.
Shares of insurer Allstate (>> The Allstate Corporation) lost 1.48 percent to $90.66 and Dow component Travelers Companies (>> The Travelers Companies) lost 2.66 percent to $123.1 after touching a four-month low of $122.42.
In a note to clients, Morgan Stanley analysts reminded investors that property catastrophe insurer stocks tend to underperform immediately after an event, only to outperform the overall market 3 to 6 months later as loss estimates sharpen and rates stabilize.
The S&P 500 property and casualty insurance index <.SPLRCINPC> stumbled 1.8 percent, on track for its worst day since Oct. 20.
Wall Street was little changed on the session, with the Dow Industrials and S&P 500 showing slight losses, while the Nasdaq posted modest gains.
Tobias Levkovich, chief U.S. equity strategist at Citigroup, said in a research note that "these tragedies are generally viewed by the Street as nonrecurring events with no significant equity market effects," as the natural disasters have less of a national impact on the economy, with any lost production made up for by repair work in coming quarters.
Ford Motor (>> Ford Motor Company) shares slipped 0.37 percent to $10.78 and General Motors (>> General Motors Corporation) shed 0.29 percent to $35.495. Analysts said that while the storm could affect the companies' operations and dealers in the short term, damage from flooding could result in a large number of light trucks being replaced.
Trucking and logistics stocks climbed, with Swift Transportation
Food retailers with a footprint in Texas also lost ground. In a note to clients, RBC analyst William Kirk estimated Sprouts Farmers Market (>> Sprouts Farmers Market Inc), down 9.66 percent, has the largest percentage of its store base in the state. It was followed by Natural Grocers (>> Natural Grocers by Vitamin Cottage Inc), off 2.42 percent and Kroger
Private forecaster Planalytics estimated the initial impact from Harvey, in terms of lost sales for the retail and consumer sector, to be $1 billion. Planalytics expects restaurants to take the biggest hit, followed by malls and apparel stores as these businesses do not make up for lost customer traffic. (Additional reporting by Sruthi Ramakrishnan and Nandita Bose; Editing by Bernadette Baum and Dan Grebler)
By Chuck Mikolajczak
