text:  Emergency doctor Ben Saldana has lived through a lot of hurricanes in his 20 years at Houston Methodist Hospital. But a hurricane plus power outages plus a brutal heat wave made the past week one of the hardest he can remember. People were streaming in with carbon monoxide poisoning from running generators or heat exhaustion from trying to clean up their backyards in extreme heat. And kidney problems for those who couldn't get dialysis because of power outages or transportation issues. Saldana says...