. The largest proposed development was Houston Center originally planned to encompass a 32-block area However by 1989 when the company that acquired the original developer sold Houston Center the complex consisted of three office buildings a shopping center and a hotel. Other large projects included the Cullen Center Allen Center and towers for Shell Oil Company the surge of skyscrapers mirrored the skyscraper booms in other sunbelt cities such as Los Angeles and Dallas Houston had experienced another downtown construction spurt in the 1970s with the energy industry boom, 11.1 Highways The area has had a number of severe weather events such as:. In traditional cultures of the Stone Age Bronze Age and hunter-gatherer societies the warfare was mostly 'endemic' long duration low intensity usually evolving into almost a ritualized form by contrast Europe had moved to 'sporadic' warfare in the Middle Ages due to the availability of professionally mercenary armies.[citation needed] When Italy was ransacked by French and Spanish Armies in the early 1500s most Italian states were easily defeated by armies practicing sporadic-warfare Aztec and other native peoples practiced an endemic system of warfare as well and so were easily defeated by Spanish and Portuguese sporadic-warfare armies in the early 1500s; . .
. Unlike Dallas Houston is not in Tornado Alley; however smaller tornadoes can occur during severe weather They are most likely to be found along frontal boundaries of an air mass during the spring months Tornadoes in Houston usually measure a weak F1 on the older Fujita scale and cause light to moderate damage to well-constructed buildings the strongest recorded tornado in Houston history was an F4 on November 21 1992 part of a large outbreak of tornadoes in Harris County, See also: List of Houston neighborhoods 7.3.1 Brutus oil spill.
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