HOLDENVILLE, Okla. — At least two people, including a child, died in tornadoes that swept through Oklahoma, authorities said Sunday as emergency crews assessed the extensive damage to homes and businesses from the high winds, hail and flooding. Dozens of reported tornadoes have wreaked havoc in the nation’s midsection since Friday, with flood watches and warnings in effect Sunday for Oklahoma and other states — including Kansas, Missouri, Arkansas and Texas. [time-brightcove not-tgx=”true”] In Oklahoma, a tornado ripped through Holdenville, a town of about 5,000 people, late Saturday, killing two people, and injuring four others, Hughes County Emergency Medical Services said in a statement Sunday.