In Pictures: Heavy rain causes havoc in HoustonPublished27 August 2017Shareclose panelShare pageCopy linkAbout sharingImage source, Getty ImagesImage caption, Heavy rain in the aftermath of Hurricane Harvey has caused chest-high flooding in some parts of the city of Houston.Image source, Getty ImagesImage caption, Some roads have turned to rivers along which the only way to rescue evacuees was by boat.Image source, ReutersImage caption, More than 25in (64cm) of rain has fallen in some parts of Houston, with a further 12 to 25in (30-64cm) expected over the next few days, the National Weather Service forecast.Image source, Getty ImagesImage caption, Such heavy rainfall in Houston is unprecedented, officials say, with recent rainfall equalling the average for an entire year.Image source, Getty ImagesImage caption, Overwhelmed emergency services have cautioned residents to head for high ground or climb onto rooftops - but not into attics - so they can if necessary be picked up by rescue helicopters. More than 1,500 rescues have been carried out so far.Image source, ReutersImage caption, Houston has opened numerous community centres for people forced out of their homes because of the bad weather but the mayor has urged people to remain in their homes and not call the emergency services unless they face life-threatening situations.Image source, ReutersImage caption, Insurance experts have warned that flood damage across Texas from the bad weather may equal the trail of destruction left by Hurricane Katrina in 2005 - that was the most expensive natural disaster in US history.Image source, ReutersImage caption, Emergency 911 operators in Houston received 56,000 calls over a 15-hour time period - seven times more than during a usual working day.Image source, ReutersImage caption, The centre of the storm is estimated at the moment to be about 125 miles away from Houston, but it is forecast to move closer to the city by Wednesday.Image source, Getty ImagesImage caption, The swift rise of the flood waters caught the authorities off guard, which is why Houston residents with boats are playing an increasingly important role in the rescue effort.Image source, EPAImage caption, The flooding had led to the closure of nearly every major road in Houston, with local media reporting that more than 170 roads are now waterlogged.Image source, Getty ImagesImage caption, The bad news for the people of Houston is that there is no sign of the rain easing up over the next few days.More on this storyHouston flooding 'epic, catastrophic'Published27 August 2017Texas governor fears severe flooding riskPublished27 August 2017US storm to bring 'catastrophic' floodingPublished26 August 2017