新华社北京７月２１日电（记者 张淼淼、关桂峰）北京市气象台２１日６时发布预报称，北京２１日午后到夜间有暴雨，西南部东北部有大暴雨，并伴有雷电，希望市民注意防雨防灾。北京市防汛办表示，北京城区９０座下凹式立交桥已建立“一桥一预案”，排水、交通、电力等部门将力保暴雨中立交桥排水通畅，不积水。

    Beijing, July 21 dec（Reporter ZhangMiaoMiao、GuanGuiFeng）The Beijing meteorological offices and 21 June release forecast says，Beijing 21 to storms have afternoon at night，The southwest have a bad storm in the northeast，And accompanied by thunder，Citizens to note the rain proof against the disaster。Beijing FangXunBan said，Beijing city 90 a concave type has been established under the overpass“A bridge a plan”，drainage、traffic、Electric power industries will be kept smooth drainage overpasses in heavy rain，No water。

    ２１日早晨的北京轻雾弥漫，天气闷热，空气潮湿得可以拧出水来。早６时北京南郊观象台的气温为２６℃，湿度高达８４％。气象部门预计今天白天阴天间多云，气温３０～２１℃，午后到夜间有暴雨，局地有大暴雨，并伴有雷电。此次降雨过程累积雨量和局地短时雨强都较大，可能会导致低洼地区及路段出现积水现象。另外，强降雨有可能诱发山区出现山洪泥石流及崩塌灾害。

    21, the Beijing morning fog diffuse light，It is hot，Damp enough to screw water。Early June the temperature observatory, south of Beijing 26 ℃，Humidity as high as 84%。Forecasters expected today between cloudy cloudy day during the day，The temperature 30 ℃ ~ 21，The storms have afternoon at night，Incorporates a torrential rain，And accompanied by thunder。The rainfall process accumulated precipitation and short-term rainfall intensity are bigger modification，May result in low-lying areas and sections appear water phenomenon。In addition，Heavy rainfall may cause flash floods and mudslides in mountain collapse disasters。

    气象部门建议政府及相关部门按照职责做好防御暴雨应急工作；切断有危险地带的室外电源，暂停户外作业；做好城市、农田的排涝，注意防范可能引发的山洪、滑坡、泥石流等灾害。适逢周末，外出旅行或到山区郊游的人员要密切注意天气信息，注意防雨防雷，避免到山洪、泥石流等地质灾害多发区活动。

    Meteorological department suggests the government and related departments to defense duties in accordance with the heavy rain emergency work；Cut off the power supply has the danger zone outdoor，Suspended outdoor work；Do city、Farmland of drainage，Pay attention to the prevention may trigger landslides、landslide、Debris flow disaster。As weekend，Travel to the mountains or the personnel should pay close attention to the outing weather information，Note the rain lightning protection，Avoid to flash floods、Mudslides geological hazards, such as universal activities。

    ２０日，北京已正式进入“七下八上”的主汛期。据气象部门预报，７月下旬北京将有三次较明显的降水天气，分别出现在７月２１日至２２日、２４日前后、２７日至２８日，大部分时间天空云量较多，空气潮湿闷热，极端最高气温约为３３℃。

    20,，Beijing has formally entered“Seven on eight”ZhuXunQi of。According to the weather department forecast，In late July, Beijing will have three times more apparent rainfall weather，There were in on July 21 and 22,、24 after a、27 to 28,，Most of the time more cloud in the sky，Hot humid air，Extreme highest temperature is about 33 ℃。

    记者从北京市防汛办了解到，针对暴雨时下凹式立交桥常常积水的状况，北京市排水、交通、电力等部门联动，对城区９０座下凹式立交桥实现视频监控，建立了“一桥一预案”的专项保障方案。根据桥体的规模、道路结构，制定个性化方案，确保暴雨中立交桥排水通畅，不积水。

    Reporters from the Beijing municipal FangXunBan to understand，For heavy rains nowadays concave type often overpasses the condition of the water，Beijing municipal drainage、traffic、Electric power industries linkage，To city 90 block concave type overpass realize video monitoring，established“A bridge a plan”Special security plan。According to bridge the size of the body、Road structure，Formulation personalization scheme，Ensure smooth drainage overpasses in heavy rain，No water。

    北京市交管局针对近年来易积水路段逐一制定了疏导绕行方案，实施“雨天上勤方案”，将通过广播电台、电视台、室外屏和互联网及时发布交通信息，按照“降雨开始”“出现积滞水”“交通中断”三个层次预警。交管部门提醒市民，雨天出行注意收听、收看相关交通信息，提前选择好出行路线，并尽量乘坐公共交通，减少路面交通压力。

    Jim hall of Beijing in recent years easy seeper sections formulated the dredge plan one around，implementation“Rainy day ShangQin scheme”，Will through the radio station、television、Outdoor screen and the Internet traffic information released in time，According to“Rain began to”“Appear stagnant water”“traffic”The three levels of warning。Tubal branch reminds a citizen，Rainy days travel note for listening、Watch the relevant traffic information，Choose good travel route in advance，And as far as possible to take public transportation，Reduce road traffic pressure。