AccuWeather.com

By Heather Buchman, Meteorologist

Sep 14, 2011; 3:00 PM ET

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Photos.com image of downtown Dallas, Texas.

Summer 2011 is officially the second hottest on record for the United States and the hottest ever for Texas, Oklahoma, New Mexico and Louisiana, according to a release from the National Oceanic and Atmosphere Association (NOAA).

Texas took the lead as the hottest state this summer and now holds the record for having the warmest summer on record of any state.

Dallas, Austin, Waco, Wichita Falls, San Angelo, San Antonio, Del Rio and Abilene had their warmest summers on record in terms of the highest mean temperature. August 2011 became the warmest month ever recorded in most of these cities.

Dallas just hit the 100-degree mark for the 70th time this year, making it the highest number of 100-degree days ever recorded in a year there.

Number of 100-degree days for select cities (as of Tuesday, Sept. 13, 2011)

--Wichita Falls: 100 days

--San Angelo: 96 days

--Waco: 85 days

--Del Rio: 82 days

--Austin (Mabry): 83 days

--Austin (Bergstrom): 69 days

--Abilene: 79 days

--Dallas: 70 days

This image, courtesy of the NOAA, depicts areas of the U.S. that experienced 100-degree heat this summer. Areas shaded in black represent locations that had more than 70 days of 100-degree heat.

Wichita Falls has eclipsed its previous record for the highest number of 100-degree days in a year with 100 days in 2011. The previous record was 79 days in the infamously hot year of 1980.

San Angelo, Waco, Austin, Del Rio and Abilene also set new records for highest number of 100-degree days. San Angelo's previous record was 60 days in 1969. The previous record in Austin Mabry was 69 days in 1925, while Austin Bergstrom's record was 55 in 2009. Del Rio's previous record was 78 in 1953. Waco beat its old record of 63 in 1980, while Abilene shattered its previous record of 46 days in 1934.

Dallas' previous record was 69 set in 1980.

Record most consecutive 100-degree days set this summer

--Wichita Falls: 52 days (previous record: 42 in 1980)

--Waco: 44 days (previous record: 42 days in 1980)

--San Angelo: 28 days (previous record: 26 in 2010)

--Austin (Mabry): 27 days (previous record: 21 in 2001)