NEW : A Polk County official says fuel fires , fanned by strong winds , are a concern . Schools had been shut down as authorities probed a possible gas leak . But despite causing extensive damage , it did not lead to any fatalities , said Stefanie Bond , a spokeswoman for Iowa 's Homeland Security & Emergency Management Division . A Red Cross liaison calls the city 's Main Street ` ` a disaster , '' with fires everywhere . Other Iowa communities are also hit hard by overnight twisters .
NEW : A Polk County official says fuel fires , fanned by strong winds , are a concern . Schools had been shut down as authorities probed a possible gas leak . A Red Cross liaison calls the city 's Main Street ` ` a disaster , '' with fires everywhere . Other Iowa communities are also hit hard by overnight twisters .