WEATHER FEARS: The dangers lurking in our backyards
QUEENSLAND is officially in a La Nina weather system, increasing the chances of a wet, flood-prone summer.
Climate modelling by the Bureau of Meteorology shows the cooling event will be weak and short-lived, lasting until early autumn next year.
"A La Nina event will bring with it lower daytime temperatures, heavy rainfall and increased risk of flooding,'' a bureau spokesman said.
Experts warn that southeast Queensland homeowners could be thousands of dollars out of pocket unless they deal with weak trees now.
Arborists say the unusually dry winter, followed by large amounts of rain, has loosened soil and made trees susceptible to damage.
Arbor Operations' Aaron Nunn said calling out an expert to check on a tree would cost less than $200, but strong wind felling a tree could push the bill to thousands.
Electricity provider Energex attends 800 incidents of vegetation blown on to powerlines during severe weather events annually, but warned homeowners against taking treescaping into their own hands.
"In more severe cases, vegetation carried by high winds can be dangerous missiles bringing down powerlines," a spokesman said.
Thunderstorms last night buffeted the Sunshine Coast, forcing the extended suspension of trains and shutting beaches along the coast.
The wild weather is expected to clear today as a dry air mass moves through, with temperatures rising to about 33C in the southeast corner.
Waves are expected to peak at 1.6m in parts of the Sunshine Coast, increasing to 2m on the Gold Coast.
Anyone worried about vegetation near powerlines should call Energex on 13 12 53.