ICS01.040.07 CCSA47 50 重庆市地方标准 DB50/T270—2024 代替DB50/T270—2008 灾害性天气等级划分 2024-12-23发布 2025-12-23实施 重庆市市场监督管理局 发布 DB50/T270—2024 I目次 前言.....................................................................................................................................................................III 1范围.....................................................................................................................................................................1 2规范性引用文件.................................................................................................................................................1 3术语和定义.........................................................................................................................................................1 4等级划分.............................................................................................................................................................2 4.1气象干旱.....................................................................................................................................................2 4.2暴雨.............................................................................................................................................................2 4.3大风.............................................................................................................................................................3 4.4冰雹.............................................................................................................................................................3 4.5高温.............................................................................................................................................................3 4.6强降温.........................................................................................................................................................3 4.7雾.................................................................................................................................................................4 4.8霾.................................................................................................................................................................4 4.9连阴雨.........................................................................................................................................................4 4.10雷电...........................................................................................................................................................4 4.11霜冻...........................................................................................................................................................5 4.12低温雨雪冰冻...........................................................................................................................................5 附录A（规范性）气象干旱时段划分................................................................................................................6 参考文献.................................................................................................................................................................7