April 18, 2016 6:35 am Raw Video: Flooding in Houston The largest school district in Texas has canceled classes as heavy rain drenched parts of the state. US & World Videos 1:46 Heat waves getting hotter, longer, and more frequent because of climate change 1:03 More than 2,000 people buried alive in Papua New Guinea landslide, Government says 45:40 How this surgeon wants to reinvent the American urgent care center 2:11 Zayn Malik surprises Kelly Clarkson with honey from his Pennsylvania farm 1:54 Kate Middleton and Prince William ‘incredibly sad' after death of Royal Air Force pilot