Paris' historic zinc roofs create an 'oven effect': This invention keeps residents cool / Households in England told to check their roof on Thursday / Scientists say painting roofs this colour could save lives: How does it keep cities cool? / Heritage organisations fear solar panels on canal house roofs / Making roofs white or reflective is the best way to keep a city cool / Roofs blown away and trees uprooted by US storms / Building officials in Anchorage aim to identify roofs prone to fail under heavy snow / 'We're going to have no free will': SA govt bans dark coloured roofs in housing development / Row of porch roofs collapse outside homes in Philadelphia neighborhood