How to help during global climate crises?

With all the recent news about floods and extreme weather displacing families globally, I really want to help out. I've been looking into different ways to send funds securely. Does anyone have experience volunteering or donating to International Charity Organizations? I want to make sure my money goes directly to on-the-ground relief efforts rather than administrative fees. Any recommendations for trustworthy global groups that are actively working on climate disaster recovery right now? Would love your input!