11.   The tornadoes caused widespread blackouts and ruptured natural gas lines, raising the specter of deadly fires and hampering rescue efforts.

12.   This week, Californians were once again plunged into darkness as warm weather and a large number of shuttered power plants caused blackouts from Santa Monica to San Francisco.

13.   Whoever caused the blackout would have needed a key to enter the substation and knowledge of how to shut down the system, the authorities said.

14.   Workers removing the flowering weed, which has destroyed fishing and caused electrical blackouts.

15.   A fire at an electrical substation caused a blackout across downtown on Sunday, tangling traffic and stranding shoppers.

16.   Antara said power failures caused blackouts in several residential areas.

17.   At least four of the dead had been hooked to respirators which failed when the fire caused an electrical blackout, Health Secretary Carmencita Reodica said.

18.   By that time, however, the hurricane had already pummeled half of the country and caused widespread blackouts.

19.   Engineers were investigating the outage, which also caused blackouts at two nearby hotels.

20.   GHB can cause blackouts when mixed with alcohol.