Houston Chronicle: If the snow storms that plagued the Northeastern states this winter warmed the hearts of climate change deniers, the record heat and cataclysmic rains across the globe in the last few months must be giving them chills. The most recent poster child for hotter times: A massive ice island four times the size of Manhattan has broken off the Greenland ice sheet and could pose a threat to oil rigs and shipping as it drifts southward, slowly melting. Actually, that dramatic image …