Hungarian work crews are racing against time to build an emergency dam as cracks widened at a burst reservoir that spilled toxic sludge.

BBC: Hungary builds wall to slow possible new sludge wave

I'm the safety manager for a company of over 400 staff and we were informed by the state emergency services that the surrounding areas were expected to flood once the Wivenhoe Dam released excess water around 0200 local time (1600 GMT).

BBC: Brisbane floods: Your stories