Chicago, IL Houston, TX Population 2.7 million 2.15 million Median HH Income $38,600 $37,000 % African-American 38.9% 24% % Hispanic 29.9% 44% % Asian 5.5% 6% % Non-Hispanic White 28.7% 26% Pretty similar until you compare the following: Chicago, IL Houston, TX Concealed Carry gun law no yes # of Gun Stores 0 184 - Dedicated gun stores plus 1500 - legal places to buy guns- Walmart, K-mart, sporting goods, etc. Homicides, 2012 1,806 207 Homicides per 100K 38.4 9.6 Avg. January high temperature  (F) 31 63 Liberal conclusion: Cold weather causes murder.